commit
4ede64b729
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@ -5,21 +5,22 @@
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// I AM NOT DONE
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// Obtain the number of bytes (not characters) in the given argument
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// Add the AsRef trait appropriately as a trait bound
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// Obtain the number of bytes (not characters) in the given argument.
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// TODO: Add the AsRef trait appropriately as a trait bound.
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fn byte_counter<T>(arg: T) -> usize {
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arg.as_ref().as_bytes().len()
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}
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// Obtain the number of characters (not bytes) in the given argument
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// Add the AsRef trait appropriately as a trait bound
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// Obtain the number of characters (not bytes) in the given argument.
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// TODO: Add the AsRef trait appropriately as a trait bound.
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fn char_counter<T>(arg: T) -> usize {
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arg.as_ref().chars().count()
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}
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// Squares a number using as_mut(). Add the trait bound as is appropriate and
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// implement the function body.
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// Squares a number using as_mut().
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// TODO: Add the appropriate trait bound.
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fn num_sq<T>(arg: &mut T) {
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// TODO: Implement the function body.
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???
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}
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@ -6,10 +6,10 @@
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// This function returns how much icecream there is left in the fridge.
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// If it's before 10PM, there's 5 pieces left. At 10PM, someone eats them
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// all, so there'll be no more left :(
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// TODO: Return an Option!
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fn maybe_icecream(time_of_day: u16) -> Option<u16> {
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// We use the 24-hour system here, so 10PM is a value of 22 and 12AM is a value of 0
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// The Option output should gracefully handle cases where time_of_day > 23.
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// TODO: Complete the function body - remember to return an Option!
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???
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}
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@ -42,7 +42,7 @@ mod my_module {
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#[cfg(test)]
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mod tests {
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// TODO: What do we have to import to have `transformer` in scope?
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// TODO: What do we need to import to have `transformer` in scope?
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use ???;
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use super::Command;
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@ -2,7 +2,7 @@
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// Time to implement some traits!
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//
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// Your task is to implement the trait
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// `AppendBar' for the type `String'.
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// `AppendBar` for the type `String`.
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//
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// The trait AppendBar has only one function,
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// which appends "Bar" to any object
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@ -16,7 +16,7 @@ trait AppendBar {
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}
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impl AppendBar for String {
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//Add your code here
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// TODO: Implement `AppendBar` for type `String`.
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}
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fn main() {
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@ -1,7 +1,7 @@
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// traits2.rs
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//
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// Your task is to implement the trait
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// `AppendBar' for a vector of strings.
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// `AppendBar` for a vector of strings.
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//
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// To implement this trait, consider for
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// a moment what it means to 'append "Bar"'
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@ -17,7 +17,7 @@ trait AppendBar {
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fn append_bar(self) -> Self;
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}
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//TODO: Add your code here
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// TODO: Implement trait `AppendBar` for a vector of strings.
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#[cfg(test)]
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mod tests {
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@ -695,7 +695,7 @@ name = "traits2"
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path = "exercises/traits/traits2.rs"
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mode = "test"
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hint = """
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Notice how the trait takes ownership of 'self',and returns `Self'.
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Notice how the trait takes ownership of 'self',and returns `Self`.
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Try mutating the incoming string vector. Have a look at the tests to see
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what the result should look like!
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Reference in New Issue