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finish traits exercises

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This commit is contained in:
lukaszKielar 2020-06-30 20:24:22 +02:00
parent 2a9bd74176
commit 5a9d6a6677
2 changed files with 16 additions and 17 deletions
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14
exercises/traits/traits1.rs
View File

@ -1,21 +1,22 @@
// traits1.rs // traits1.rs
// Time to implement some traits! // Time to implement some traits!
// //
// Your task is to implement the trait // Your task is to implement the trait
// `AppendBar' for the type `String'. // `AppendBar' for the type `String'.
// //
// The trait AppendBar has only one function, // The trait AppendBar has only one function,
// which appends "Bar" to any object // which appends "Bar" to any object
// implementing this trait. // implementing this trait.
// I AM NOT DONE
trait AppendBar { trait AppendBar {
fn append_bar(self) -> Self; fn append_bar(self) -> Self;
} }
impl AppendBar for String { impl AppendBar for String {
//Add your code here fn append_bar(mut self) -> Self {
self.push_str("Bar");
self
}
} }
fn main() { fn main() {
@ -40,5 +41,4 @@ mod tests {
String::from("BarBar") String::from("BarBar")
); );
} }
}
}

19
exercises/traits/traits2.rs
View File

@ -1,25 +1,25 @@
// traits2.rs // traits2.rs
// //
// Your task is to implement the trait // Your task is to implement the trait
// `AppendBar' for a vector of strings. // `AppendBar' for a vector of strings.
// //
// To implement this trait, consider for // To implement this trait, consider for
// a moment what it means to 'append "Bar"' // 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!
// I AM NOT DONE
trait AppendBar { trait AppendBar {
fn append_bar(self) -> Self; fn append_bar(self) -> Self;
} }
//TODO: Add your code here impl AppendBar for Vec<String> {
fn append_bar(mut self) -> Self {
self.push("Bar".to_string());
self
}
}
#[cfg(test)] #[cfg(test)]
mod tests { mod tests {
@ -31,5 +31,4 @@ mod tests {
assert_eq!(foo.pop().unwrap(), String::from("Bar")); assert_eq!(foo.pop().unwrap(), String::from("Bar"));
assert_eq!(foo.pop().unwrap(), String::from("Foo")); assert_eq!(foo.pop().unwrap(), String::from("Foo"));
} }
} }