Merge pull request #1535 from robertefry/comment_cleanup
docs: cleanup the explanation paragraphs at the start of each exercise.
This commit is contained in:
commit
132d5ca943
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@ -1,10 +1,13 @@
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// clippy1.rs
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// clippy1.rs
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// The Clippy tool is a collection of lints to analyze your code
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// so you can catch common mistakes and improve your Rust code.
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//
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//
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// For these exercises the code will fail to compile when there are clippy warnings
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// The Clippy tool is a collection of lints to analyze your code so you can
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// check clippy's suggestions from the output to solve the exercise.
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// catch common mistakes and improve your Rust code.
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// Execute `rustlings hint clippy1` or use the `hint` watch subcommand for a hint.
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//
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// For these exercises the code will fail to compile when there are clippy
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// warnings check clippy's suggestions from the output to solve the exercise.
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//
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// Execute `rustlings hint clippy1` or use the `hint` watch subcommand for a
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// hint.
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// I AM NOT DONE
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// I AM NOT DONE
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@ -1,5 +1,7 @@
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// clippy2.rs
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// clippy2.rs
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// Execute `rustlings hint clippy2` or use the `hint` watch subcommand for a hint.
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//
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// Execute `rustlings hint clippy2` or use the `hint` watch subcommand for a
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// hint.
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// I AM NOT DONE
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// I AM NOT DONE
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@ -1,5 +1,8 @@
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// clippy3.rs
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// clippy3.rs
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//
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// Here's a couple more easy Clippy fixes, so you can see its utility.
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// Here's a couple more easy Clippy fixes, so you can see its utility.
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//
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// Execute `rustlings hint clippy3` or use the `hint` watch subcommand for a hint.
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// I AM NOT DONE
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// I AM NOT DONE
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@ -1,7 +1,11 @@
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// AsRef and AsMut allow for cheap reference-to-reference conversions.
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// as_ref_mut.rs
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// Read more about them at https://doc.rust-lang.org/std/convert/trait.AsRef.html
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//
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// and https://doc.rust-lang.org/std/convert/trait.AsMut.html, respectively.
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// AsRef and AsMut allow for cheap reference-to-reference conversions. Read more
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// Execute `rustlings hint as_ref_mut` or use the `hint` watch subcommand for a hint.
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// about them at https://doc.rust-lang.org/std/convert/trait.AsRef.html and
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// https://doc.rust-lang.org/std/convert/trait.AsMut.html, respectively.
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//
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// Execute `rustlings hint as_ref_mut` or use the `hint` watch subcommand for a
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// hint.
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// I AM NOT DONE
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// I AM NOT DONE
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@ -1,7 +1,11 @@
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// The From trait is used for value-to-value conversions.
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// from_into.rs
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// If From is implemented correctly for a type, the Into trait should work conversely.
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//
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// You can read more about it at https://doc.rust-lang.org/std/convert/trait.From.html
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// The From trait is used for value-to-value conversions. If From is implemented
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// Execute `rustlings hint from_into` or use the `hint` watch subcommand for a hint.
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// correctly for a type, the Into trait should work conversely. You can read
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// more about it at https://doc.rust-lang.org/std/convert/trait.From.html
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//
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// Execute `rustlings hint from_into` or use the `hint` watch subcommand for a
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// hint.
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#[derive(Debug)]
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#[derive(Debug)]
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struct Person {
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struct Person {
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@ -20,20 +24,21 @@ impl Default for Person {
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}
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}
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}
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}
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// Your task is to complete this implementation
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// Your task is to complete this implementation in order for the line `let p =
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// in order for the line `let p = Person::from("Mark,20")` to compile
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// Person::from("Mark,20")` to compile Please note that you'll need to parse the
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// Please note that you'll need to parse the age component into a `usize`
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// age component into a `usize` with something like `"4".parse::<usize>()`. The
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// with something like `"4".parse::<usize>()`. The outcome of this needs to
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// outcome of this needs to be handled appropriately.
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// be handled appropriately.
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//
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//
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// Steps:
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// Steps:
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// 1. If the length of the provided string is 0, then return the default of Person
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// 1. If the length of the provided string is 0, then return the default of
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// 2. Split the given string on the commas present in it
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// Person.
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// 3. Extract the first element from the split operation and use it as the name
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// 2. Split the given string on the commas present in it.
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// 4. If the name is empty, then return the default of Person
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// 3. Extract the first element from the split operation and use it as the name.
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// 5. Extract the other element from the split operation and parse it into a `usize` as the age
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// 4. If the name is empty, then return the default of Person.
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// If while parsing the age, something goes wrong, then return the default of Person
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// 5. Extract the other element from the split operation and parse it into a
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// Otherwise, then return an instantiated Person object with the results
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// `usize` as the age.
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// If while parsing the age, something goes wrong, then return the default of
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// Person Otherwise, then return an instantiated Person object with the results
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// I AM NOT DONE
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// I AM NOT DONE
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@ -77,7 +82,8 @@ mod tests {
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}
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}
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#[test]
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#[test]
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fn test_bad_age() {
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fn test_bad_age() {
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// Test that "Mark,twenty" will return the default person due to an error in parsing age
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// Test that "Mark,twenty" will return the default person due to an
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// error in parsing age
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let p = Person::from("Mark,twenty");
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let p = Person::from("Mark,twenty");
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assert_eq!(p.name, "John");
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assert_eq!(p.name, "John");
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assert_eq!(p.age, 30);
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assert_eq!(p.age, 30);
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@ -1,10 +1,13 @@
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// from_str.rs
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// from_str.rs
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// This is similar to from_into.rs, but this time we'll implement `FromStr`
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//
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// and return errors instead of falling back to a default value.
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// This is similar to from_into.rs, but this time we'll implement `FromStr` and
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// Additionally, upon implementing FromStr, you can use the `parse` method
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// return errors instead of falling back to a default value. Additionally, upon
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// on strings to generate an object of the implementor type.
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// implementing FromStr, you can use the `parse` method on strings to generate
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// You can read more about it at https://doc.rust-lang.org/std/str/trait.FromStr.html
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// an object of the implementor type. You can read more about it at
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// Execute `rustlings hint from_str` or use the `hint` watch subcommand for a hint.
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// https://doc.rust-lang.org/std/str/trait.FromStr.html
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//
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// Execute `rustlings hint from_str` or use the `hint` watch subcommand for a
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// hint.
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use std::num::ParseIntError;
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use std::num::ParseIntError;
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use std::str::FromStr;
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use std::str::FromStr;
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@ -33,15 +36,18 @@ enum ParsePersonError {
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// Steps:
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// Steps:
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// 1. If the length of the provided string is 0, an error should be returned
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// 1. If the length of the provided string is 0, an error should be returned
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// 2. Split the given string on the commas present in it
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// 2. Split the given string on the commas present in it
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// 3. Only 2 elements should be returned from the split, otherwise return an error
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// 3. Only 2 elements should be returned from the split, otherwise return an
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// error
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// 4. Extract the first element from the split operation and use it as the name
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// 4. Extract the first element from the split operation and use it as the name
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// 5. Extract the other element from the split operation and parse it into a `usize` as the age
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// 5. Extract the other element from the split operation and parse it into a
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// with something like `"4".parse::<usize>()`
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// `usize` as the age with something like `"4".parse::<usize>()`
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// 6. If while extracting the name and the age something goes wrong, an error should be returned
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// 6. If while extracting the name and the age something goes wrong, an error
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// should be returned
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// If everything goes well, then return a Result of a Person object
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// If everything goes well, then return a Result of a Person object
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//
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//
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// As an aside: `Box<dyn Error>` implements `From<&'_ str>`. This means that if you want to return a
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// As an aside: `Box<dyn Error>` implements `From<&'_ str>`. This means that if
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// string error message, you can do so via just using return `Err("my error message".into())`.
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// you want to return a string error message, you can do so via just using
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// return `Err("my error message".into())`.
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impl FromStr for Person {
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impl FromStr for Person {
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type Err = ParsePersonError;
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type Err = ParsePersonError;
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@ -1,9 +1,13 @@
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// try_from_into.rs
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// try_from_into.rs
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// TryFrom is a simple and safe type conversion that may fail in a controlled way under some circumstances.
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//
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// Basically, this is the same as From. The main difference is that this should return a Result type
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// TryFrom is a simple and safe type conversion that may fail in a controlled
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// instead of the target type itself.
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// way under some circumstances. Basically, this is the same as From. The main
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// You can read more about it at https://doc.rust-lang.org/std/convert/trait.TryFrom.html
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// difference is that this should return a Result type instead of the target
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// Execute `rustlings hint try_from_into` or use the `hint` watch subcommand for a hint.
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// type itself. You can read more about it at
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// https://doc.rust-lang.org/std/convert/trait.TryFrom.html
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//
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// Execute `rustlings hint try_from_into` or use the `hint` watch subcommand for
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// a hint.
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use std::convert::{TryFrom, TryInto};
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use std::convert::{TryFrom, TryInto};
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@ -25,14 +29,13 @@ enum IntoColorError {
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// I AM NOT DONE
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// I AM NOT DONE
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// Your task is to complete this implementation
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// Your task is to complete this implementation and return an Ok result of inner
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// and return an Ok result of inner type Color.
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// type Color. You need to create an implementation for a tuple of three
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// You need to create an implementation for a tuple of three integers,
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// integers, an array of three integers, and a slice of integers.
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// an array of three integers, and a slice of integers.
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//
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//
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// Note that the implementation for tuple and array will be checked at compile time,
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// Note that the implementation for tuple and array will be checked at compile
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// but the slice implementation needs to check the slice length!
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// time, but the slice implementation needs to check the slice length! Also note
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// Also note that correct RGB color values must be integers in the 0..=255 range.
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// that correct RGB color values must be integers in the 0..=255 range.
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// Tuple implementation
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// Tuple implementation
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impl TryFrom<(i16, i16, i16)> for Color {
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impl TryFrom<(i16, i16, i16)> for Color {
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@ -1,10 +1,14 @@
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// Type casting in Rust is done via the usage of the `as` operator.
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// using_as.rs
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// Please note that the `as` operator is not only used when type casting.
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// It also helps with renaming imports.
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//
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//
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// The goal is to make sure that the division does not fail to compile
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// Type casting in Rust is done via the usage of the `as` operator. Please note
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// and returns the proper type.
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// that the `as` operator is not only used when type casting. It also helps with
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// Execute `rustlings hint using_as` or use the `hint` watch subcommand for a hint.
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// renaming imports.
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//
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// The goal is to make sure that the division does not fail to compile and
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// returns the proper type.
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//
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// Execute `rustlings hint using_as` or use the `hint` watch subcommand for a
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// hint.
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// I AM NOT DONE
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// I AM NOT DONE
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@ -1,4 +1,5 @@
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// enums1.rs
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// enums1.rs
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//
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// No hints this time! ;)
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// No hints this time! ;)
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// I AM NOT DONE
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// I AM NOT DONE
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@ -1,5 +1,7 @@
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// enums2.rs
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// enums2.rs
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// Execute `rustlings hint enums2` or use the `hint` watch subcommand for a hint.
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//
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// Execute `rustlings hint enums2` or use the `hint` watch subcommand for a
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// hint.
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// I AM NOT DONE
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// I AM NOT DONE
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@ -1,6 +1,9 @@
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// enums3.rs
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// enums3.rs
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//
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// Address all the TODOs to make the tests pass!
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// Address all the TODOs to make the tests pass!
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// Execute `rustlings hint enums3` or use the `hint` watch subcommand for a hint.
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//
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// Execute `rustlings hint enums3` or use the `hint` watch subcommand for a
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// hint.
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// I AM NOT DONE
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// I AM NOT DONE
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@ -36,8 +39,10 @@ impl State {
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}
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}
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fn process(&mut self, message: Message) {
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fn process(&mut self, message: Message) {
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// TODO: create a match expression to process the different message variants
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// TODO: create a match expression to process the different message
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// Remember: When passing a tuple as a function argument, you'll need extra parentheses: fn function((t, u, p, l, e))
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// variants
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// Remember: When passing a tuple as a function argument, you'll need
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// extra parentheses: fn function((t, u, p, l, e))
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}
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}
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}
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}
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@ -1,9 +1,13 @@
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// errors1.rs
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// errors1.rs
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// This function refuses to generate text to be printed on a nametag if
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//
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// you pass it an empty string. It'd be nicer if it explained what the problem
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// This function refuses to generate text to be printed on a nametag if you pass
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// was, instead of just sometimes returning `None`. Thankfully, Rust has a similar
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// it an empty string. It'd be nicer if it explained what the problem was,
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// construct to `Option` that can be used to express error conditions. Let's use it!
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// instead of just sometimes returning `None`. Thankfully, Rust has a similar
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// Execute `rustlings hint errors1` or use the `hint` watch subcommand for a hint.
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// construct to `Option` that can be used to express error conditions. Let's use
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// it!
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//
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// Execute `rustlings hint errors1` or use the `hint` watch subcommand for a
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// hint.
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// I AM NOT DONE
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// I AM NOT DONE
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||||||
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@ -1,21 +1,23 @@
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// errors2.rs
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// errors2.rs
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//
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// Say we're writing a game where you can buy items with tokens. All items cost
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// Say we're writing a game where you can buy items with tokens. All items cost
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// 5 tokens, and whenever you purchase items there is a processing fee of 1
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// 5 tokens, and whenever you purchase items there is a processing fee of 1
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// token. A player of the game will type in how many items they want to buy,
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// token. A player of the game will type in how many items they want to buy, and
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// and the `total_cost` function will calculate the total cost of the tokens.
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// the `total_cost` function will calculate the total cost of the tokens. Since
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// Since the player typed in the quantity, though, we get it as a string-- and
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// the player typed in the quantity, though, we get it as a string-- and they
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// they might have typed anything, not just numbers!
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// might have typed anything, not just numbers!
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//
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// Right now, this function isn't handling the error case at all (and isn't
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// Right now, this function isn't handling the error case at all (and isn't
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||||||
// handling the success case properly either). What we want to do is:
|
// handling the success case properly either). What we want to do is: if we call
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||||||
// if we call the `parse` function on a string that is not a number, that
|
// the `parse` function on a string that is not a number, that function will
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// function will return a `ParseIntError`, and in that case, we want to
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// return a `ParseIntError`, and in that case, we want to immediately return
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// immediately return that error from our function and not try to multiply
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// that error from our function and not try to multiply and add.
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// and add.
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//
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||||||
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// There are at least two ways to implement this that are both correct-- but one
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// There are at least two ways to implement this that are both correct-- but
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// is a lot shorter!
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// one is a lot shorter!
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//
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// Execute `rustlings hint errors2` or use the `hint` watch subcommand for a hint.
|
// Execute `rustlings hint errors2` or use the `hint` watch subcommand for a
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// hint.
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||||||
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// I AM NOT DONE
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// I AM NOT DONE
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||||||
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||||||
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|
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@ -1,8 +1,11 @@
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||||||
// errors3.rs
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// errors3.rs
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//
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// This is a program that is trying to use a completed version of the
|
// This is a program that is trying to use a completed version of the
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// `total_cost` function from the previous exercise. It's not working though!
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// `total_cost` function from the previous exercise. It's not working though!
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// Why not? What should we do to fix it?
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// Why not? What should we do to fix it?
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||||||
// Execute `rustlings hint errors3` or use the `hint` watch subcommand for a hint.
|
//
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||||||
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// Execute `rustlings hint errors3` or use the `hint` watch subcommand for a
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||||||
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// hint.
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||||||
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// I AM NOT DONE
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// I AM NOT DONE
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||||||
|
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||||||
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|
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@ -1,5 +1,7 @@
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||||||
// errors4.rs
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// errors4.rs
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// Execute `rustlings hint errors4` or use the `hint` watch subcommand for a hint.
|
//
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||||||
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// Execute `rustlings hint errors4` or use the `hint` watch subcommand for a
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||||||
|
// hint.
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||||||
|
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||||||
// I AM NOT DONE
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// I AM NOT DONE
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||||||
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||||||
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|
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@ -1,20 +1,26 @@
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||||||
// errors5.rs
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// errors5.rs
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||||||
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//
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||||||
// This program uses an altered version of the code from errors4.
|
// This program uses an altered version of the code from errors4.
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||||||
|
//
|
||||||
// This exercise uses some concepts that we won't get to until later in the course, like `Box` and the
|
// This exercise uses some concepts that we won't get to until later in the
|
||||||
// `From` trait. It's not important to understand them in detail right now, but you can read ahead if you like.
|
// course, like `Box` and the `From` trait. It's not important to understand
|
||||||
// For now, think of the `Box<dyn ???>` type as an "I want anything that does ???" type, which, given
|
// them in detail right now, but you can read ahead if you like. For now, think
|
||||||
// Rust's usual standards for runtime safety, should strike you as somewhat lenient!
|
// of the `Box<dyn ???>` type as an "I want anything that does ???" type, which,
|
||||||
|
// given Rust's usual standards for runtime safety, should strike you as
|
||||||
// In short, this particular use case for boxes is for when you want to own a value and you care only that it is a
|
// somewhat lenient!
|
||||||
// type which implements a particular trait. To do so, The Box is declared as of type Box<dyn Trait> where Trait is the trait
|
//
|
||||||
// the compiler looks for on any value used in that context. For this exercise, that context is the potential errors
|
// In short, this particular use case for boxes is for when you want to own a
|
||||||
// which can be returned in a Result.
|
// value and you care only that it is a type which implements a particular
|
||||||
|
// trait. To do so, The Box is declared as of type Box<dyn Trait> where Trait is
|
||||||
// What can we use to describe both errors? In other words, is there a trait which both errors implement?
|
// the trait the compiler looks for on any value used in that context. For this
|
||||||
|
// exercise, that context is the potential errors which can be returned in a
|
||||||
// Execute `rustlings hint errors5` or use the `hint` watch subcommand for a hint.
|
// Result.
|
||||||
|
//
|
||||||
|
// What can we use to describe both errors? In other words, is there a trait
|
||||||
|
// which both errors implement?
|
||||||
|
//
|
||||||
|
// Execute `rustlings hint errors5` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,12 +1,13 @@
|
||||||
// errors6.rs
|
// errors6.rs
|
||||||
|
//
|
||||||
// Using catch-all error types like `Box<dyn error::Error>` isn't recommended
|
// Using catch-all error types like `Box<dyn error::Error>` isn't recommended
|
||||||
// for library code, where callers might want to make decisions based on the
|
// for library code, where callers might want to make decisions based on the
|
||||||
// error content, instead of printing it out or propagating it further. Here,
|
// error content, instead of printing it out or propagating it further. Here, we
|
||||||
// we define a custom error type to make it possible for callers to decide
|
// define a custom error type to make it possible for callers to decide what to
|
||||||
// what to do next when our function returns an error.
|
// do next when our function returns an error.
|
||||||
|
//
|
||||||
// Execute `rustlings hint errors6` or use the `hint` watch subcommand for a hint.
|
// Execute `rustlings hint errors6` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,5 +1,7 @@
|
||||||
// functions1.rs
|
// functions1.rs
|
||||||
// Execute `rustlings hint functions1` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint functions1` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,5 +1,7 @@
|
||||||
// functions2.rs
|
// functions2.rs
|
||||||
// Execute `rustlings hint functions2` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint functions2` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,5 +1,7 @@
|
||||||
// functions3.rs
|
// functions3.rs
|
||||||
// Execute `rustlings hint functions3` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint functions3` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,11 +1,12 @@
|
||||||
// functions4.rs
|
// functions4.rs
|
||||||
// Execute `rustlings hint functions4` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// This store is having a sale where if the price is an even number, you get 10
|
||||||
// This store is having a sale where if the price is an even number, you get
|
// Rustbucks off, but if it's an odd number, it's 3 Rustbucks off. (Don't worry
|
||||||
// 10 Rustbucks off, but if it's an odd number, it's 3 Rustbucks off.
|
// about the function bodies themselves, we're only interested in the signatures
|
||||||
// (Don't worry about the function bodies themselves, we're only interested
|
// for now. If anything, this is a good way to peek ahead to future exercises!)
|
||||||
// in the signatures for now. If anything, this is a good way to peek ahead
|
//
|
||||||
// to future exercises!)
|
// Execute `rustlings hint functions4` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,5 +1,7 @@
|
||||||
// functions5.rs
|
// functions5.rs
|
||||||
// Execute `rustlings hint functions5` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint functions5` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,7 +1,10 @@
|
||||||
// This shopping list program isn't compiling!
|
// generics1.rs
|
||||||
// Use your knowledge of generics to fix it.
|
//
|
||||||
|
// This shopping list program isn't compiling! Use your knowledge of generics to
|
||||||
// Execute `rustlings hint generics1` or use the `hint` watch subcommand for a hint.
|
// fix it.
|
||||||
|
//
|
||||||
|
// Execute `rustlings hint generics1` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,7 +1,10 @@
|
||||||
|
// generics2.rs
|
||||||
|
//
|
||||||
// This powerful wrapper provides the ability to store a positive integer value.
|
// This powerful wrapper provides the ability to store a positive integer value.
|
||||||
// Rewrite it using generics so that it supports wrapping ANY type.
|
// Rewrite it using generics so that it supports wrapping ANY type.
|
||||||
|
//
|
||||||
// Execute `rustlings hint generics2` or use the `hint` watch subcommand for a hint.
|
// Execute `rustlings hint generics2` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,14 +1,15 @@
|
||||||
// hashmaps1.rs
|
// hashmaps1.rs
|
||||||
// A basket of fruits in the form of a hash map needs to be defined.
|
//
|
||||||
// The key represents the name of the fruit and the value represents
|
// A basket of fruits in the form of a hash map needs to be defined. The key
|
||||||
// how many of that particular fruit is in the basket. You have to put
|
// represents the name of the fruit and the value represents how many of that
|
||||||
// at least three different types of fruits (e.g apple, banana, mango)
|
// particular fruit is in the basket. You have to put at least three different
|
||||||
// in the basket and the total count of all the fruits should be at
|
// types of fruits (e.g apple, banana, mango) in the basket and the total count
|
||||||
// least five.
|
// of all the fruits should be at least five.
|
||||||
//
|
//
|
||||||
// Make me compile and pass the tests!
|
// Make me compile and pass the tests!
|
||||||
//
|
//
|
||||||
// Execute `rustlings hint hashmaps1` or use the `hint` watch subcommand for a hint.
|
// Execute `rustlings hint hashmaps1` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,17 +1,18 @@
|
||||||
// hashmaps2.rs
|
// hashmaps2.rs
|
||||||
// We're collecting different fruits to bake a delicious fruit cake.
|
//
|
||||||
// For this, we have a basket, which we'll represent in the form of a hash
|
// We're collecting different fruits to bake a delicious fruit cake. For this,
|
||||||
// map. The key represents the name of each fruit we collect and the value
|
// we have a basket, which we'll represent in the form of a hash map. The key
|
||||||
// represents how many of that particular fruit we have collected.
|
// represents the name of each fruit we collect and the value represents how
|
||||||
// Three types of fruits - Apple (4), Mango (2) and Lychee (5) are already
|
// many of that particular fruit we have collected. Three types of fruits -
|
||||||
// in the basket hash map.
|
// Apple (4), Mango (2) and Lychee (5) are already in the basket hash map. You
|
||||||
// You must add fruit to the basket so that there is at least
|
// must add fruit to the basket so that there is at least one of each kind and
|
||||||
// one of each kind and more than 11 in total - we have a lot of mouths to feed.
|
// more than 11 in total - we have a lot of mouths to feed. You are not allowed
|
||||||
// You are not allowed to insert any more of these fruits!
|
// to insert any more of these fruits!
|
||||||
//
|
//
|
||||||
// Make me pass the tests!
|
// Make me pass the tests!
|
||||||
//
|
//
|
||||||
// Execute `rustlings hint hashmaps2` or use the `hint` watch subcommand for a hint.
|
// Execute `rustlings hint hashmaps2` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
@ -36,9 +37,9 @@ fn fruit_basket(basket: &mut HashMap<Fruit, u32>) {
|
||||||
];
|
];
|
||||||
|
|
||||||
for fruit in fruit_kinds {
|
for fruit in fruit_kinds {
|
||||||
// TODO: Insert new fruits if they are not already present in the basket.
|
// TODO: Insert new fruits if they are not already present in the
|
||||||
// Note that you are not allowed to put any type of fruit that's already
|
// basket. Note that you are not allowed to put any type of fruit that's
|
||||||
// present!
|
// already present!
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
|
@ -1,18 +1,18 @@
|
||||||
// hashmaps3.rs
|
// hashmaps3.rs
|
||||||
|
//
|
||||||
// A list of scores (one per line) of a soccer match is given. Each line
|
// A list of scores (one per line) of a soccer match is given. Each line is of
|
||||||
// is of the form :
|
// the form : "<team_1_name>,<team_2_name>,<team_1_goals>,<team_2_goals>"
|
||||||
// <team_1_name>,<team_2_name>,<team_1_goals>,<team_2_goals>
|
|
||||||
// Example: England,France,4,2 (England scored 4 goals, France 2).
|
// Example: England,France,4,2 (England scored 4 goals, France 2).
|
||||||
|
//
|
||||||
// You have to build a scores table containing the name of the team, goals
|
// You have to build a scores table containing the name of the team, goals the
|
||||||
// the team scored, and goals the team conceded. One approach to build
|
// team scored, and goals the team conceded. One approach to build the scores
|
||||||
// the scores table is to use a Hashmap. The solution is partially
|
// table is to use a Hashmap. The solution is partially written to use a
|
||||||
// written to use a Hashmap, complete it to pass the test.
|
// Hashmap, complete it to pass the test.
|
||||||
|
//
|
||||||
// Make me pass the tests!
|
// Make me pass the tests!
|
||||||
|
//
|
||||||
// Execute `rustlings hint hashmaps3` or use the `hint` watch subcommand for a hint.
|
// Execute `rustlings hint hashmaps3` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,4 +1,5 @@
|
||||||
// if1.rs
|
// if1.rs
|
||||||
|
//
|
||||||
// Execute `rustlings hint if1` or use the `hint` watch subcommand for a hint.
|
// Execute `rustlings hint if1` or use the `hint` watch subcommand for a hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
|
@ -1,7 +1,8 @@
|
||||||
// if2.rs
|
// if2.rs
|
||||||
|
//
|
||||||
// Step 1: Make me compile!
|
// Step 1: Make me compile!
|
||||||
// Step 2: Get the bar_for_fuzz and default_to_baz tests passing!
|
// Step 2: Get the bar_for_fuzz and default_to_baz tests passing!
|
||||||
|
//
|
||||||
// Execute `rustlings hint if2` or use the `hint` watch subcommand for a hint.
|
// Execute `rustlings hint if2` or use the `hint` watch subcommand for a hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
|
@ -1,13 +1,17 @@
|
||||||
// intro1.rs
|
// intro1.rs
|
||||||
|
//
|
||||||
// About this `I AM NOT DONE` thing:
|
// About this `I AM NOT DONE` thing:
|
||||||
// We sometimes encourage you to keep trying things on a given exercise, even
|
// We sometimes encourage you to keep trying things on a given exercise, even
|
||||||
// after you already figured it out. If you got everything working and feel
|
// after you already figured it out. If you got everything working and feel
|
||||||
// ready for the next exercise, remove the `I AM NOT DONE` comment below.
|
// ready for the next exercise, remove the `I AM NOT DONE` comment below.
|
||||||
// Execute `rustlings hint intro1` or use the `hint` watch subcommand for a hint.
|
|
||||||
//
|
//
|
||||||
// If you're running this using `rustlings watch`: The exercise file will be reloaded
|
// If you're running this using `rustlings watch`: The exercise file will be
|
||||||
// when you change one of the lines below! Try adding a `println!` line, or try changing
|
// reloaded when you change one of the lines below! Try adding a `println!`
|
||||||
// what it outputs in your terminal. Try removing a semicolon and see what happens!
|
// line, or try changing what it outputs in your terminal. Try removing a
|
||||||
|
// semicolon and see what happens!
|
||||||
|
//
|
||||||
|
// Execute `rustlings hint intro1` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,6 +1,9 @@
|
||||||
// intro2.rs
|
// intro2.rs
|
||||||
|
//
|
||||||
// Make the code print a greeting to the world.
|
// Make the code print a greeting to the world.
|
||||||
// Execute `rustlings hint intro2` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint intro2` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,12 +1,13 @@
|
||||||
// iterators1.rs
|
// iterators1.rs
|
||||||
//
|
//
|
||||||
// Make me compile by filling in the `???`s
|
// When performing operations on elements within a collection, iterators are
|
||||||
|
// essential. This module helps you get familiar with the structure of using an
|
||||||
|
// iterator and how to go through elements within an iterable collection.
|
||||||
//
|
//
|
||||||
// When performing operations on elements within a collection, iterators are essential.
|
// Make me compile by filling in the `???`s
|
||||||
// This module helps you get familiar with the structure of using an iterator and
|
|
||||||
// how to go through elements within an iterable collection.
|
|
||||||
//
|
//
|
||||||
// Execute `rustlings hint iterators1` or use the `hint` watch subcommand for a hint.
|
// Execute `rustlings hint iterators1` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,7 +1,10 @@
|
||||||
// iterators2.rs
|
// iterators2.rs
|
||||||
|
//
|
||||||
// In this exercise, you'll learn some of the unique advantages that iterators
|
// In this exercise, you'll learn some of the unique advantages that iterators
|
||||||
// can offer. Follow the steps to complete the exercise.
|
// can offer. Follow the steps to complete the exercise.
|
||||||
// Execute `rustlings hint iterators2` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint iterators2` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,10 +1,13 @@
|
||||||
// iterators3.rs
|
// iterators3.rs
|
||||||
// This is a bigger exercise than most of the others! You can do it!
|
//
|
||||||
// Here is your mission, should you choose to accept it:
|
// This is a bigger exercise than most of the others! You can do it! Here is
|
||||||
|
// your mission, should you choose to accept it:
|
||||||
// 1. Complete the divide function to get the first four tests to pass.
|
// 1. Complete the divide function to get the first four tests to pass.
|
||||||
// 2. Get the remaining tests to pass by completing the result_with_list and
|
// 2. Get the remaining tests to pass by completing the result_with_list and
|
||||||
// list_of_results functions.
|
// list_of_results functions.
|
||||||
// Execute `rustlings hint iterators3` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint iterators3` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
@ -26,14 +29,16 @@ pub fn divide(a: i32, b: i32) -> Result<i32, DivisionError> {
|
||||||
todo!();
|
todo!();
|
||||||
}
|
}
|
||||||
|
|
||||||
// Complete the function and return a value of the correct type so the test passes.
|
// Complete the function and return a value of the correct type so the test
|
||||||
|
// passes.
|
||||||
// Desired output: Ok([1, 11, 1426, 3])
|
// Desired output: Ok([1, 11, 1426, 3])
|
||||||
fn result_with_list() -> () {
|
fn result_with_list() -> () {
|
||||||
let numbers = vec![27, 297, 38502, 81];
|
let numbers = vec![27, 297, 38502, 81];
|
||||||
let division_results = numbers.into_iter().map(|n| divide(n, 27));
|
let division_results = numbers.into_iter().map(|n| divide(n, 27));
|
||||||
}
|
}
|
||||||
|
|
||||||
// Complete the function and return a value of the correct type so the test passes.
|
// Complete the function and return a value of the correct type so the test
|
||||||
|
// passes.
|
||||||
// Desired output: [Ok(1), Ok(11), Ok(1426), Ok(3)]
|
// Desired output: [Ok(1), Ok(11), Ok(1426), Ok(3)]
|
||||||
fn list_of_results() -> () {
|
fn list_of_results() -> () {
|
||||||
let numbers = vec![27, 297, 38502, 81];
|
let numbers = vec![27, 297, 38502, 81];
|
||||||
|
|
|
@ -1,5 +1,7 @@
|
||||||
// iterators4.rs
|
// iterators4.rs
|
||||||
// Execute `rustlings hint iterators4` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint iterators4` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,4 +1,5 @@
|
||||||
// iterators5.rs
|
// iterators5.rs
|
||||||
|
//
|
||||||
// Let's define a simple model to track Rustlings exercise progress. Progress
|
// Let's define a simple model to track Rustlings exercise progress. Progress
|
||||||
// will be modelled using a hash map. The name of the exercise is the key and
|
// will be modelled using a hash map. The name of the exercise is the key and
|
||||||
// the progress is the value. Two counting functions were created to count the
|
// the progress is the value. Two counting functions were created to count the
|
||||||
|
@ -6,7 +7,9 @@
|
||||||
// functionality using iterators. Try not to use imperative loops (for, while).
|
// functionality using iterators. Try not to use imperative loops (for, while).
|
||||||
// Only the two iterator methods (count_iterator and count_collection_iterator)
|
// Only the two iterator methods (count_iterator and count_collection_iterator)
|
||||||
// need to be modified.
|
// need to be modified.
|
||||||
// Execute `rustlings hint iterators5` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint iterators5` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,11 +1,12 @@
|
||||||
// lifetimes1.rs
|
// lifetimes1.rs
|
||||||
//
|
//
|
||||||
// The Rust compiler needs to know how to check whether supplied references are
|
// The Rust compiler needs to know how to check whether supplied references are
|
||||||
// valid, so that it can let the programmer know if a reference is at risk
|
// valid, so that it can let the programmer know if a reference is at risk of
|
||||||
// of going out of scope before it is used. Remember, references are borrows
|
// going out of scope before it is used. Remember, references are borrows and do
|
||||||
// and do not own their own data. What if their owner goes out of scope?
|
// not own their own data. What if their owner goes out of scope?
|
||||||
//
|
//
|
||||||
// Execute `rustlings hint lifetimes1` or use the `hint` watch subcommand for a hint.
|
// Execute `rustlings hint lifetimes1` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,10 +1,10 @@
|
||||||
// lifetimes2.rs
|
// lifetimes2.rs
|
||||||
//
|
//
|
||||||
// So if the compiler is just validating the references passed
|
// So if the compiler is just validating the references passed to the annotated
|
||||||
// to the annotated parameters and the return type, what do
|
// parameters and the return type, what do we need to change?
|
||||||
// we need to change?
|
|
||||||
//
|
//
|
||||||
// Execute `rustlings hint lifetimes2` or use the `hint` watch subcommand for a hint.
|
// Execute `rustlings hint lifetimes2` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -2,7 +2,8 @@
|
||||||
//
|
//
|
||||||
// Lifetimes are also needed when structs hold references.
|
// Lifetimes are also needed when structs hold references.
|
||||||
//
|
//
|
||||||
// Execute `rustlings hint lifetimes3` or use the `hint` watch subcommand for a hint.
|
// Execute `rustlings hint lifetimes3` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,5 +1,7 @@
|
||||||
// macros1.rs
|
// macros1.rs
|
||||||
// Execute `rustlings hint macros1` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint macros1` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,5 +1,7 @@
|
||||||
// macros2.rs
|
// macros2.rs
|
||||||
// Execute `rustlings hint macros2` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint macros2` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,6 +1,9 @@
|
||||||
// macros3.rs
|
// macros3.rs
|
||||||
|
//
|
||||||
// Make me compile, without taking the macro out of the module!
|
// Make me compile, without taking the macro out of the module!
|
||||||
// Execute `rustlings hint macros3` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint macros3` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,5 +1,7 @@
|
||||||
// macros4.rs
|
// macros4.rs
|
||||||
// Execute `rustlings hint macros4` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint macros4` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,5 +1,7 @@
|
||||||
// modules1.rs
|
// modules1.rs
|
||||||
// Execute `rustlings hint modules1` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint modules1` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,7 +1,11 @@
|
||||||
// modules2.rs
|
// modules2.rs
|
||||||
// You can bring module paths into scopes and provide new names for them with the
|
//
|
||||||
// 'use' and 'as' keywords. Fix these 'use' statements to make the code compile.
|
// You can bring module paths into scopes and provide new names for them with
|
||||||
// Execute `rustlings hint modules2` or use the `hint` watch subcommand for a hint.
|
// the 'use' and 'as' keywords. Fix these 'use' statements to make the code
|
||||||
|
// compile.
|
||||||
|
//
|
||||||
|
// Execute `rustlings hint modules2` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,9 +1,12 @@
|
||||||
// modules3.rs
|
// modules3.rs
|
||||||
// You can use the 'use' keyword to bring module paths from modules from anywhere
|
//
|
||||||
// and especially from the Rust standard library into your scope.
|
// You can use the 'use' keyword to bring module paths from modules from
|
||||||
// Bring SystemTime and UNIX_EPOCH
|
// anywhere and especially from the Rust standard library into your scope. Bring
|
||||||
// from the std::time module. Bonus style points if you can do it with one line!
|
// SystemTime and UNIX_EPOCH from the std::time module. Bonus style points if
|
||||||
// Execute `rustlings hint modules3` or use the `hint` watch subcommand for a hint.
|
// you can do it with one line!
|
||||||
|
//
|
||||||
|
// Execute `rustlings hint modules3` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,5 +1,7 @@
|
||||||
// move_semantics1.rs
|
// move_semantics1.rs
|
||||||
// Execute `rustlings hint move_semantics1` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint move_semantics1` or use the `hint` watch subcommand
|
||||||
|
// for a hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,9 +1,11 @@
|
||||||
// move_semantics2.rs
|
// move_semantics2.rs
|
||||||
// Execute `rustlings hint move_semantics2` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
|
||||||
// Expected output:
|
// Expected output:
|
||||||
// vec0 has length 3, with contents `[22, 44, 66]`
|
// vec0 has length 3, with contents `[22, 44, 66]`
|
||||||
// vec1 has length 4, with contents `[22, 44, 66, 88]`
|
// vec1 has length 4, with contents `[22, 44, 66, 88]`
|
||||||
|
//
|
||||||
|
// Execute `rustlings hint move_semantics2` or use the `hint` watch subcommand
|
||||||
|
// for a hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,7 +1,10 @@
|
||||||
// move_semantics3.rs
|
// move_semantics3.rs
|
||||||
// Make me compile without adding new lines-- just changing existing lines!
|
//
|
||||||
// (no lines with multiple semicolons necessary!)
|
// Make me compile without adding new lines-- just changing existing lines! (no
|
||||||
// Execute `rustlings hint move_semantics3` or use the `hint` watch subcommand for a hint.
|
// lines with multiple semicolons necessary!)
|
||||||
|
//
|
||||||
|
// Execute `rustlings hint move_semantics3` or use the `hint` watch subcommand
|
||||||
|
// for a hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,8 +1,11 @@
|
||||||
// move_semantics4.rs
|
// move_semantics4.rs
|
||||||
// Refactor this code so that instead of passing `vec0` into the `fill_vec` function,
|
//
|
||||||
// the Vector gets created in the function itself and passed back to the main
|
// Refactor this code so that instead of passing `vec0` into the `fill_vec`
|
||||||
// function.
|
// function, the Vector gets created in the function itself and passed back to
|
||||||
// Execute `rustlings hint move_semantics4` or use the `hint` watch subcommand for a hint.
|
// the main function.
|
||||||
|
//
|
||||||
|
// Execute `rustlings hint move_semantics4` or use the `hint` watch subcommand
|
||||||
|
// for a hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,7 +1,10 @@
|
||||||
// move_semantics5.rs
|
// move_semantics5.rs
|
||||||
// Make me compile only by reordering the lines in `main()`, but without
|
//
|
||||||
// adding, changing or removing any of them.
|
// Make me compile only by reordering the lines in `main()`, but without adding,
|
||||||
// Execute `rustlings hint move_semantics5` or use the `hint` watch subcommand for a hint.
|
// changing or removing any of them.
|
||||||
|
//
|
||||||
|
// Execute `rustlings hint move_semantics5` or use the `hint` watch subcommand
|
||||||
|
// for a hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,6 +1,9 @@
|
||||||
// move_semantics6.rs
|
// move_semantics6.rs
|
||||||
// Execute `rustlings hint move_semantics6` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
// You can't change anything except adding or removing references.
|
// You can't change anything except adding or removing references.
|
||||||
|
//
|
||||||
|
// Execute `rustlings hint move_semantics6` or use the `hint` watch subcommand
|
||||||
|
// for a hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,5 +1,7 @@
|
||||||
// options1.rs
|
// options1.rs
|
||||||
// Execute `rustlings hint options1` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint options1` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
@ -7,8 +9,9 @@
|
||||||
// If it's before 10PM, there's 5 pieces left. At 10PM, someone eats them
|
// If it's before 10PM, there's 5 pieces left. At 10PM, someone eats them
|
||||||
// all, so there'll be no more left :(
|
// all, so there'll be no more left :(
|
||||||
fn maybe_icecream(time_of_day: u16) -> Option<u16> {
|
fn maybe_icecream(time_of_day: u16) -> Option<u16> {
|
||||||
// We use the 24-hour system here, so 10PM is a value of 22 and 12AM is a value of 0
|
// We use the 24-hour system here, so 10PM is a value of 22 and 12AM is a
|
||||||
// The Option output should gracefully handle cases where time_of_day > 23.
|
// value of 0 The Option output should gracefully handle cases where
|
||||||
|
// time_of_day > 23.
|
||||||
// TODO: Complete the function body - remember to return an Option!
|
// TODO: Complete the function body - remember to return an Option!
|
||||||
???
|
???
|
||||||
}
|
}
|
||||||
|
@ -28,7 +31,8 @@ mod tests {
|
||||||
|
|
||||||
#[test]
|
#[test]
|
||||||
fn raw_value() {
|
fn raw_value() {
|
||||||
// TODO: Fix this test. How do you get at the value contained in the Option?
|
// TODO: Fix this test. How do you get at the value contained in the
|
||||||
|
// Option?
|
||||||
let icecreams = maybe_icecream(12);
|
let icecreams = maybe_icecream(12);
|
||||||
assert_eq!(icecreams, 5);
|
assert_eq!(icecreams, 5);
|
||||||
}
|
}
|
||||||
|
|
|
@ -1,5 +1,7 @@
|
||||||
// options2.rs
|
// options2.rs
|
||||||
// Execute `rustlings hint options2` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint options2` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
@ -27,8 +29,9 @@ mod tests {
|
||||||
|
|
||||||
let mut cursor = range;
|
let mut cursor = range;
|
||||||
|
|
||||||
// TODO: make this a while let statement - remember that vector.pop also adds another layer of Option<T>
|
// TODO: make this a while let statement - remember that vector.pop also
|
||||||
// You can stack `Option<T>`s into while let and if let
|
// adds another layer of Option<T>. You can stack `Option<T>`s into
|
||||||
|
// while let and if let.
|
||||||
integer = optional_integers.pop() {
|
integer = optional_integers.pop() {
|
||||||
assert_eq!(integer, cursor);
|
assert_eq!(integer, cursor);
|
||||||
cursor -= 1;
|
cursor -= 1;
|
||||||
|
|
|
@ -1,5 +1,7 @@
|
||||||
// options3.rs
|
// options3.rs
|
||||||
// Execute `rustlings hint options3` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint options3` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,6 +1,10 @@
|
||||||
// primitive_types1.rs
|
// primitive_types1.rs
|
||||||
// Fill in the rest of the line that has code missing!
|
//
|
||||||
// No hints, there's no tricks, just get used to typing these :)
|
// Fill in the rest of the line that has code missing! No hints, there's no
|
||||||
|
// tricks, just get used to typing these :)
|
||||||
|
//
|
||||||
|
// Execute `rustlings hint primitive_types1` or use the `hint` watch subcommand
|
||||||
|
// for a hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,6 +1,10 @@
|
||||||
// primitive_types2.rs
|
// primitive_types2.rs
|
||||||
// Fill in the rest of the line that has code missing!
|
//
|
||||||
// No hints, there's no tricks, just get used to typing these :)
|
// Fill in the rest of the line that has code missing! No hints, there's no
|
||||||
|
// tricks, just get used to typing these :)
|
||||||
|
//
|
||||||
|
// Execute `rustlings hint primitive_types2` or use the `hint` watch subcommand
|
||||||
|
// for a hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,6 +1,9 @@
|
||||||
// primitive_types3.rs
|
// primitive_types3.rs
|
||||||
|
//
|
||||||
// Create an array with at least 100 elements in it where the ??? is.
|
// Create an array with at least 100 elements in it where the ??? is.
|
||||||
// Execute `rustlings hint primitive_types3` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint primitive_types3` or use the `hint` watch subcommand
|
||||||
|
// for a hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,6 +1,9 @@
|
||||||
// primitive_types4.rs
|
// primitive_types4.rs
|
||||||
|
//
|
||||||
// Get a slice out of Array a where the ??? is so that the test passes.
|
// Get a slice out of Array a where the ??? is so that the test passes.
|
||||||
// Execute `rustlings hint primitive_types4` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint primitive_types4` or use the `hint` watch subcommand
|
||||||
|
// for a hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,6 +1,9 @@
|
||||||
// primitive_types5.rs
|
// primitive_types5.rs
|
||||||
|
//
|
||||||
// Destructure the `cat` tuple so that the println will work.
|
// Destructure the `cat` tuple so that the println will work.
|
||||||
// Execute `rustlings hint primitive_types5` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint primitive_types5` or use the `hint` watch subcommand
|
||||||
|
// for a hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,7 +1,10 @@
|
||||||
// primitive_types6.rs
|
// primitive_types6.rs
|
||||||
// Use a tuple index to access the second element of `numbers`.
|
//
|
||||||
// You can put the expression for the second element where ??? is so that the test passes.
|
// Use a tuple index to access the second element of `numbers`. You can put the
|
||||||
// Execute `rustlings hint primitive_types6` or use the `hint` watch subcommand for a hint.
|
// expression for the second element where ??? is so that the test passes.
|
||||||
|
//
|
||||||
|
// Execute `rustlings hint primitive_types6` or use the `hint` watch subcommand
|
||||||
|
// for a hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,14 +1,17 @@
|
||||||
// quiz1.rs
|
// quiz1.rs
|
||||||
|
//
|
||||||
// This is a quiz for the following sections:
|
// This is a quiz for the following sections:
|
||||||
// - Variables
|
// - Variables
|
||||||
// - Functions
|
// - Functions
|
||||||
// - If
|
// - If
|
||||||
|
//
|
||||||
// Mary is buying apples. The price of an apple is calculated as follows:
|
// Mary is buying apples. The price of an apple is calculated as follows:
|
||||||
// - An apple costs 2 rustbucks.
|
// - An apple costs 2 rustbucks.
|
||||||
// - If Mary buys more than 40 apples, each apple only costs 1 rustbuck!
|
// - If Mary buys more than 40 apples, each apple only costs 1 rustbuck!
|
||||||
// Write a function that calculates the price of an order of apples given
|
// Write a function that calculates the price of an order of apples given the
|
||||||
// the quantity bought. No hints this time!
|
// quantity bought. No hints this time!
|
||||||
|
//
|
||||||
|
// No hints this time ;)
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,14 +1,15 @@
|
||||||
// quiz2.rs
|
// quiz2.rs
|
||||||
|
//
|
||||||
// This is a quiz for the following sections:
|
// This is a quiz for the following sections:
|
||||||
// - Strings
|
// - Strings
|
||||||
// - Vecs
|
// - Vecs
|
||||||
// - Move semantics
|
// - Move semantics
|
||||||
// - Modules
|
// - Modules
|
||||||
// - Enums
|
// - Enums
|
||||||
|
//
|
||||||
// Let's build a little machine in the form of a function.
|
// Let's build a little machine in the form of a function. As input, we're going
|
||||||
// As input, we're going to give a list of strings and commands. These commands
|
// to give a list of strings and commands. These commands determine what action
|
||||||
// determine what action is going to be applied to the string. It can either be:
|
// is going to be applied to the string. It can either be:
|
||||||
// - Uppercase the string
|
// - Uppercase the string
|
||||||
// - Trim the string
|
// - Trim the string
|
||||||
// - Append "bar" to the string a specified amount of times
|
// - Append "bar" to the string a specified amount of times
|
||||||
|
@ -16,6 +17,7 @@
|
||||||
// - The input is going to be a Vector of a 2-length tuple,
|
// - The input is going to be a Vector of a 2-length tuple,
|
||||||
// the first element is the string, the second one is the command.
|
// the first element is the string, the second one is the command.
|
||||||
// - The output element is going to be a Vector of strings.
|
// - The output element is going to be a Vector of strings.
|
||||||
|
//
|
||||||
// No hints this time!
|
// No hints this time!
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
|
@ -1,17 +1,19 @@
|
||||||
// quiz3.rs
|
// quiz3.rs
|
||||||
|
//
|
||||||
// This quiz tests:
|
// This quiz tests:
|
||||||
// - Generics
|
// - Generics
|
||||||
// - Traits
|
// - Traits
|
||||||
// An imaginary magical school has a new report card generation system written in Rust!
|
//
|
||||||
// Currently the system only supports creating report cards where the student's grade
|
// An imaginary magical school has a new report card generation system written
|
||||||
// is represented numerically (e.g. 1.0 -> 5.5).
|
// in Rust! Currently the system only supports creating report cards where the
|
||||||
// However, the school also issues alphabetical grades (A+ -> F-) and needs
|
// student's grade is represented numerically (e.g. 1.0 -> 5.5). However, the
|
||||||
// to be able to print both types of report card!
|
// school also issues alphabetical grades (A+ -> F-) and needs to be able to
|
||||||
|
// print both types of report card!
|
||||||
|
//
|
||||||
// Make the necessary code changes in the struct ReportCard and the impl block
|
// Make the necessary code changes in the struct ReportCard and the impl block
|
||||||
// to support alphabetical report cards. Change the Grade in the second test to "A+"
|
// to support alphabetical report cards. Change the Grade in the second test to
|
||||||
// to show that your changes allow alphabetical grades.
|
// "A+" to show that your changes allow alphabetical grades.
|
||||||
|
//
|
||||||
// Execute `rustlings hint quiz3` or use the `hint` watch subcommand for a hint.
|
// Execute `rustlings hint quiz3` or use the `hint` watch subcommand for a hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
|
@ -1,21 +1,24 @@
|
||||||
// arc1.rs
|
// arc1.rs
|
||||||
// In this exercise, we are given a Vec of u32 called "numbers" with values ranging
|
//
|
||||||
// from 0 to 99 -- [ 0, 1, 2, ..., 98, 99 ]
|
// In this exercise, we are given a Vec of u32 called "numbers" with values
|
||||||
// We would like to use this set of numbers within 8 different threads simultaneously.
|
// ranging from 0 to 99 -- [ 0, 1, 2, ..., 98, 99 ] We would like to use this
|
||||||
// Each thread is going to get the sum of every eighth value, with an offset.
|
// set of numbers within 8 different threads simultaneously. Each thread is
|
||||||
|
// going to get the sum of every eighth value, with an offset.
|
||||||
|
//
|
||||||
// The first thread (offset 0), will sum 0, 8, 16, ...
|
// The first thread (offset 0), will sum 0, 8, 16, ...
|
||||||
// The second thread (offset 1), will sum 1, 9, 17, ...
|
// The second thread (offset 1), will sum 1, 9, 17, ...
|
||||||
// The third thread (offset 2), will sum 2, 10, 18, ...
|
// The third thread (offset 2), will sum 2, 10, 18, ...
|
||||||
// ...
|
// ...
|
||||||
// The eighth thread (offset 7), will sum 7, 15, 23, ...
|
// The eighth thread (offset 7), will sum 7, 15, 23, ...
|
||||||
|
//
|
||||||
// Because we are using threads, our values need to be thread-safe. Therefore,
|
// Because we are using threads, our values need to be thread-safe. Therefore,
|
||||||
// we are using Arc. We need to make a change in each of the two TODOs.
|
// we are using Arc. We need to make a change in each of the two TODOs.
|
||||||
|
//
|
||||||
|
|
||||||
// Make this code compile by filling in a value for `shared_numbers` where the
|
// Make this code compile by filling in a value for `shared_numbers` where the
|
||||||
// first TODO comment is, and create an initial binding for `child_numbers`
|
// first TODO comment is, and create an initial binding for `child_numbers`
|
||||||
// where the second TODO comment is. Try not to create any copies of the `numbers` Vec!
|
// where the second TODO comment is. Try not to create any copies of the
|
||||||
|
// `numbers` Vec!
|
||||||
|
//
|
||||||
// Execute `rustlings hint arc1` or use the `hint` watch subcommand for a hint.
|
// Execute `rustlings hint arc1` or use the `hint` watch subcommand for a hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
|
@ -1,13 +1,15 @@
|
||||||
// box1.rs
|
// box1.rs
|
||||||
//
|
//
|
||||||
// At compile time, Rust needs to know how much space a type takes up. This becomes problematic
|
// At compile time, Rust needs to know how much space a type takes up. This
|
||||||
// for recursive types, where a value can have as part of itself another value of the same type.
|
// becomes problematic for recursive types, where a value can have as part of
|
||||||
// To get around the issue, we can use a `Box` - a smart pointer used to store data on the heap,
|
// itself another value of the same type. To get around the issue, we can use a
|
||||||
// which also allows us to wrap a recursive type.
|
// `Box` - a smart pointer used to store data on the heap, which also allows us
|
||||||
|
// to wrap a recursive type.
|
||||||
//
|
//
|
||||||
// The recursive type we're implementing in this exercise is the `cons list` - a data structure
|
// The recursive type we're implementing in this exercise is the `cons list` - a
|
||||||
// frequently found in functional programming languages. Each item in a cons list contains two
|
// data structure frequently found in functional programming languages. Each
|
||||||
// elements: the value of the current item and the next item. The last item is a value called `Nil`.
|
// item in a cons list contains two elements: the value of the current item and
|
||||||
|
// the next item. The last item is a value called `Nil`.
|
||||||
//
|
//
|
||||||
// Step 1: use a `Box` in the enum definition to make the code compile
|
// Step 1: use a `Box` in the enum definition to make the code compile
|
||||||
// Step 2: create both empty and non-empty cons lists by replacing `todo!()`
|
// Step 2: create both empty and non-empty cons lists by replacing `todo!()`
|
||||||
|
|
|
@ -1,12 +1,16 @@
|
||||||
// cow1.rs
|
// cow1.rs
|
||||||
|
//
|
||||||
// This exercise explores the Cow, or Clone-On-Write type.
|
// This exercise explores the Cow, or Clone-On-Write type. Cow is a
|
||||||
// Cow is a clone-on-write smart pointer.
|
// clone-on-write smart pointer. It can enclose and provide immutable access to
|
||||||
// It can enclose and provide immutable access to borrowed data, and clone the data lazily when mutation or ownership is required.
|
// borrowed data, and clone the data lazily when mutation or ownership is
|
||||||
// The type is designed to work with general borrowed data via the Borrow trait.
|
// required. The type is designed to work with general borrowed data via the
|
||||||
|
// Borrow trait.
|
||||||
//
|
//
|
||||||
// This exercise is meant to show you what to expect when passing data to Cow.
|
// This exercise is meant to show you what to expect when passing data to Cow.
|
||||||
// Fix the unit tests by checking for Cow::Owned(_) and Cow::Borrowed(_) at the TODO markers.
|
// Fix the unit tests by checking for Cow::Owned(_) and Cow::Borrowed(_) at the
|
||||||
|
// TODO markers.
|
||||||
|
//
|
||||||
|
// Execute `rustlings hint cow1` or use the `hint` watch subcommand for a hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
@ -50,10 +54,9 @@ mod tests {
|
||||||
|
|
||||||
#[test]
|
#[test]
|
||||||
fn owned_no_mutation() -> Result<(), &'static str> {
|
fn owned_no_mutation() -> Result<(), &'static str> {
|
||||||
// We can also pass `slice` without `&` so Cow owns it directly.
|
// We can also pass `slice` without `&` so Cow owns it directly. In this
|
||||||
// In this case no mutation occurs and thus also no clone,
|
// case no mutation occurs and thus also no clone, but the result is
|
||||||
// but the result is still owned because it was never borrowed
|
// still owned because it was never borrowed or mutated.
|
||||||
// or mutated.
|
|
||||||
let slice = vec![0, 1, 2];
|
let slice = vec![0, 1, 2];
|
||||||
let mut input = Cow::from(slice);
|
let mut input = Cow::from(slice);
|
||||||
match abs_all(&mut input) {
|
match abs_all(&mut input) {
|
||||||
|
@ -63,9 +66,9 @@ mod tests {
|
||||||
|
|
||||||
#[test]
|
#[test]
|
||||||
fn owned_mutation() -> Result<(), &'static str> {
|
fn owned_mutation() -> Result<(), &'static str> {
|
||||||
// Of course this is also the case if a mutation does occur.
|
// Of course this is also the case if a mutation does occur. In this
|
||||||
// In this case the call to `to_mut()` returns a reference to
|
// case the call to `to_mut()` returns a reference to the same data as
|
||||||
// the same data as before.
|
// before.
|
||||||
let slice = vec![-1, 0, 1];
|
let slice = vec![-1, 0, 1];
|
||||||
let mut input = Cow::from(slice);
|
let mut input = Cow::from(slice);
|
||||||
match abs_all(&mut input) {
|
match abs_all(&mut input) {
|
||||||
|
|
|
@ -1,9 +1,14 @@
|
||||||
// rc1.rs
|
// rc1.rs
|
||||||
// In this exercise, we want to express the concept of multiple owners via the Rc<T> type.
|
//
|
||||||
// This is a model of our solar system - there is a Sun type and multiple Planets.
|
// In this exercise, we want to express the concept of multiple owners via the
|
||||||
// The Planets take ownership of the sun, indicating that they revolve around the sun.
|
// Rc<T> type. This is a model of our solar system - there is a Sun type and
|
||||||
|
// multiple Planets. The Planets take ownership of the sun, indicating that they
|
||||||
// Make this code compile by using the proper Rc primitives to express that the sun has multiple owners.
|
// revolve around the sun.
|
||||||
|
//
|
||||||
|
// Make this code compile by using the proper Rc primitives to express that the
|
||||||
|
// sun has multiple owners.
|
||||||
|
//
|
||||||
|
// Execute `rustlings hint rc1` or use the `hint` watch subcommand for a hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,6 +1,9 @@
|
||||||
// strings1.rs
|
// strings1.rs
|
||||||
|
//
|
||||||
// Make me compile without changing the function signature!
|
// Make me compile without changing the function signature!
|
||||||
// Execute `rustlings hint strings1` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint strings1` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,6 +1,9 @@
|
||||||
// strings2.rs
|
// strings2.rs
|
||||||
|
//
|
||||||
// Make me compile without changing the function signature!
|
// Make me compile without changing the function signature!
|
||||||
// Execute `rustlings hint strings2` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint strings2` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,5 +1,7 @@
|
||||||
// strings3.rs
|
// strings3.rs
|
||||||
// Execute `rustlings hint strings3` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint strings3` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,9 +1,10 @@
|
||||||
// strings4.rs
|
// strings4.rs
|
||||||
|
//
|
||||||
// Ok, here are a bunch of values-- some are `String`s, some are `&str`s. Your
|
// Ok, here are a bunch of values-- some are `String`s, some are `&str`s. Your
|
||||||
// task is to call one of these two functions on each value depending on what
|
// task is to call one of these two functions on each value depending on what
|
||||||
// you think each value is. That is, add either `string_slice` or `string`
|
// you think each value is. That is, add either `string_slice` or `string`
|
||||||
// before the parentheses on each line. If you're right, it will compile!
|
// before the parentheses on each line. If you're right, it will compile!
|
||||||
|
//
|
||||||
// No hints this time!
|
// No hints this time!
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
|
@ -1,6 +1,9 @@
|
||||||
// structs1.rs
|
// structs1.rs
|
||||||
|
//
|
||||||
// Address all the TODOs to make the tests pass!
|
// Address all the TODOs to make the tests pass!
|
||||||
// Execute `rustlings hint structs1` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint structs1` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,6 +1,9 @@
|
||||||
// structs2.rs
|
// structs2.rs
|
||||||
|
//
|
||||||
// Address all the TODOs to make the tests pass!
|
// Address all the TODOs to make the tests pass!
|
||||||
// Execute `rustlings hint structs2` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint structs2` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,8 +1,11 @@
|
||||||
// structs3.rs
|
// structs3.rs
|
||||||
|
//
|
||||||
// Structs contain data, but can also have logic. In this exercise we have
|
// Structs contain data, but can also have logic. In this exercise we have
|
||||||
// defined the Package struct and we want to test some logic attached to it.
|
// defined the Package struct and we want to test some logic attached to it.
|
||||||
// Make the code compile and the tests pass!
|
// Make the code compile and the tests pass!
|
||||||
// Execute `rustlings hint structs3` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint structs3` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,11 +1,14 @@
|
||||||
// tests1.rs
|
// tests1.rs
|
||||||
// Tests are important to ensure that your code does what you think it should do.
|
//
|
||||||
// Tests can be run on this file with the following command:
|
// Tests are important to ensure that your code does what you think it should
|
||||||
// rustlings run tests1
|
// do. Tests can be run on this file with the following command: rustlings run
|
||||||
|
// tests1
|
||||||
// This test has a problem with it -- make the test compile! Make the test
|
//
|
||||||
// pass! Make the test fail!
|
// This test has a problem with it -- make the test compile! Make the test pass!
|
||||||
// Execute `rustlings hint tests1` or use the `hint` watch subcommand for a hint.
|
// Make the test fail!
|
||||||
|
//
|
||||||
|
// Execute `rustlings hint tests1` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,7 +1,10 @@
|
||||||
// tests2.rs
|
// tests2.rs
|
||||||
// This test has a problem with it -- make the test compile! Make the test
|
//
|
||||||
// pass! Make the test fail!
|
// This test has a problem with it -- make the test compile! Make the test pass!
|
||||||
// Execute `rustlings hint tests2` or use the `hint` watch subcommand for a hint.
|
// Make the test fail!
|
||||||
|
//
|
||||||
|
// Execute `rustlings hint tests2` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,8 +1,11 @@
|
||||||
// tests3.rs
|
// tests3.rs
|
||||||
|
//
|
||||||
// This test isn't testing our function -- make it do that in such a way that
|
// This test isn't testing our function -- make it do that in such a way that
|
||||||
// the test passes. Then write a second test that tests whether we get the result
|
// the test passes. Then write a second test that tests whether we get the
|
||||||
// we expect to get when we call `is_even(5)`.
|
// result we expect to get when we call `is_even(5)`.
|
||||||
// Execute `rustlings hint tests3` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint tests3` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,6 +1,9 @@
|
||||||
// tests4.rs
|
// tests4.rs
|
||||||
|
//
|
||||||
// Make sure that we're testing for the correct conditions!
|
// Make sure that we're testing for the correct conditions!
|
||||||
// Execute `rustlings hint tests4` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint tests4` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,10 +1,12 @@
|
||||||
// threads1.rs
|
// threads1.rs
|
||||||
// Execute `rustlings hint threads1` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// This program spawns multiple threads that each run for at least 250ms, and
|
||||||
// This program spawns multiple threads that each run for at least 250ms,
|
// each thread returns how much time they took to complete. The program should
|
||||||
// and each thread returns how much time they took to complete.
|
// wait until all the spawned threads have finished and should collect their
|
||||||
// The program should wait until all the spawned threads have finished and
|
// return values into a vector.
|
||||||
// should collect their return values into a vector.
|
//
|
||||||
|
// Execute `rustlings hint threads1` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,7 +1,11 @@
|
||||||
// threads2.rs
|
// threads2.rs
|
||||||
// Execute `rustlings hint threads2` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
// Building on the last exercise, we want all of the threads to complete their work but this time
|
// Building on the last exercise, we want all of the threads to complete their
|
||||||
// the spawned threads need to be in charge of updating a shared value: JobStatus.jobs_completed
|
// work but this time the spawned threads need to be in charge of updating a
|
||||||
|
// shared value: JobStatus.jobs_completed
|
||||||
|
//
|
||||||
|
// Execute `rustlings hint threads2` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
@ -27,8 +31,9 @@ fn main() {
|
||||||
}
|
}
|
||||||
for handle in handles {
|
for handle in handles {
|
||||||
handle.join().unwrap();
|
handle.join().unwrap();
|
||||||
// TODO: Print the value of the JobStatus.jobs_completed. Did you notice anything
|
// TODO: Print the value of the JobStatus.jobs_completed. Did you notice
|
||||||
// interesting in the output? Do you have to 'join' on all the handles?
|
// anything interesting in the output? Do you have to 'join' on all the
|
||||||
|
// handles?
|
||||||
println!("jobs completed {}", ???);
|
println!("jobs completed {}", ???);
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
|
@ -1,5 +1,7 @@
|
||||||
// threads3.rs
|
// threads3.rs
|
||||||
// Execute `rustlings hint threads3` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint threads3` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,13 +1,11 @@
|
||||||
// traits1.rs
|
// traits1.rs
|
||||||
// Time to implement some traits!
|
|
||||||
//
|
//
|
||||||
// Your task is to implement the trait
|
// Time to implement some traits! Your task is to implement the trait
|
||||||
// `AppendBar` for the type `String`.
|
// `AppendBar` for the type `String`. The trait AppendBar has only one function,
|
||||||
|
// which appends "Bar" to any object implementing this trait.
|
||||||
//
|
//
|
||||||
// The trait AppendBar has only one function,
|
// Execute `rustlings hint traits1` or use the `hint` watch subcommand for a
|
||||||
// which appends "Bar" to any object
|
// hint.
|
||||||
// implementing this trait.
|
|
||||||
// Execute `rustlings hint traits1` or use the `hint` watch subcommand for a hint.
|
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,14 +1,11 @@
|
||||||
// traits2.rs
|
// traits2.rs
|
||||||
//
|
//
|
||||||
// Your task is to implement the trait
|
// Your task is to implement the trait `AppendBar` for a vector of strings. To
|
||||||
// `AppendBar` for a vector of strings.
|
// implement this trait, consider for a moment what it means to 'append "Bar"'
|
||||||
//
|
|
||||||
// To implement this trait, consider for
|
|
||||||
// a moment what it means to 'append "Bar"'
|
|
||||||
// to a vector of strings.
|
// to a vector of strings.
|
||||||
//
|
//
|
||||||
// No boiler plate code this time,
|
// No boiler plate code this time, you can do this!
|
||||||
// you can do this!
|
//
|
||||||
// Execute `rustlings hint traits2` or use the `hint` watch subcommand for a hint.
|
// Execute `rustlings hint traits2` or use the `hint` watch subcommand for a hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
|
@ -1,11 +1,12 @@
|
||||||
// traits3.rs
|
// traits3.rs
|
||||||
//
|
//
|
||||||
// Your task is to implement the Licensed trait for
|
// Your task is to implement the Licensed trait for both structures and have
|
||||||
// both structures and have them return the same
|
// them return the same information without writing the same function twice.
|
||||||
// information without writing the same function twice.
|
|
||||||
//
|
//
|
||||||
// Consider what you can add to the Licensed trait.
|
// Consider what you can add to the Licensed trait.
|
||||||
// Execute `rustlings hint traits3` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint traits3` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,8 +1,11 @@
|
||||||
// traits4.rs
|
// traits4.rs
|
||||||
//
|
//
|
||||||
// Your task is to replace the '??' sections so the code compiles.
|
// Your task is to replace the '??' sections so the code compiles.
|
||||||
|
//
|
||||||
// Don't change any line other than the marked one.
|
// Don't change any line other than the marked one.
|
||||||
// Execute `rustlings hint traits4` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint traits4` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,8 +1,11 @@
|
||||||
// traits5.rs
|
// traits5.rs
|
||||||
//
|
//
|
||||||
// Your task is to replace the '??' sections so the code compiles.
|
// Your task is to replace the '??' sections so the code compiles.
|
||||||
|
//
|
||||||
// Don't change any line other than the marked one.
|
// Don't change any line other than the marked one.
|
||||||
// Execute `rustlings hint traits5` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint traits5` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,6 +1,9 @@
|
||||||
// variables1.rs
|
// variables1.rs
|
||||||
|
//
|
||||||
// Make me compile!
|
// Make me compile!
|
||||||
// Execute `rustlings hint variables1` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint variables1` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,5 +1,7 @@
|
||||||
// variables2.rs
|
// variables2.rs
|
||||||
// Execute `rustlings hint variables2` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint variables2` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,5 +1,7 @@
|
||||||
// variables3.rs
|
// variables3.rs
|
||||||
// Execute `rustlings hint variables3` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint variables3` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,5 +1,7 @@
|
||||||
// variables4.rs
|
// variables4.rs
|
||||||
// Execute `rustlings hint variables4` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint variables4` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,5 +1,7 @@
|
||||||
// variables5.rs
|
// variables5.rs
|
||||||
// Execute `rustlings hint variables5` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint variables5` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,5 +1,7 @@
|
||||||
// variables6.rs
|
// variables6.rs
|
||||||
// Execute `rustlings hint variables6` or use the `hint` watch subcommand for a hint.
|
//
|
||||||
|
// Execute `rustlings hint variables6` or use the `hint` watch subcommand for a
|
||||||
|
// hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
||||||
|
|
|
@ -1,7 +1,10 @@
|
||||||
// vecs1.rs
|
// vecs1.rs
|
||||||
// Your task is to create a `Vec` which holds the exact same elements
|
//
|
||||||
// as in the array `a`.
|
// Your task is to create a `Vec` which holds the exact same elements as in the
|
||||||
|
// array `a`.
|
||||||
|
//
|
||||||
// Make me compile and pass the test!
|
// Make me compile and pass the test!
|
||||||
|
//
|
||||||
// Execute `rustlings hint vecs1` or use the `hint` watch subcommand for a hint.
|
// Execute `rustlings hint vecs1` or use the `hint` watch subcommand for a hint.
|
||||||
|
|
||||||
// I AM NOT DONE
|
// I AM NOT DONE
|
||||||
|
|
|
@ -1,6 +1,7 @@
|
||||||
// vecs2.rs
|
// vecs2.rs
|
||||||
// A Vec of even numbers is given. Your task is to complete the loop
|
//
|
||||||
// so that each number in the Vec is multiplied by 2.
|
// A Vec of even numbers is given. Your task is to complete the loop so that
|
||||||
|
// each number in the Vec is multiplied by 2.
|
||||||
//
|
//
|
||||||
// Make me pass the test!
|
// Make me pass the test!
|
||||||
//
|
//
|
||||||
|
|
Loading…
Reference in New Issue