Ejercicios 63/94
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@ -3,9 +3,7 @@
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// Execute `rustlings hint generics1` or use the `hint` watch subcommand for a hint.
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// I AM NOT DONE
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fn main() {
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let mut shopping_list: Vec<?> = Vec::new();
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let mut shopping_list: Vec<&str> = Vec::new();
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shopping_list.push("milk");
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}
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@ -3,14 +3,12 @@
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// Execute `rustlings hint generics2` or use the `hint` watch subcommand for a hint.
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// I AM NOT DONE
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struct Wrapper {
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value: u32,
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struct Wrapper<T> {
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value: T,
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}
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impl Wrapper {
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pub fn new(value: u32) -> Self {
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impl<T> Wrapper<T> {
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pub fn new(value: T) -> Self {
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Wrapper { value }
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}
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}
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@ -9,14 +9,14 @@
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// implementing this trait.
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// Execute `rustlings hint traits1` or use the `hint` watch subcommand for a hint.
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// I AM NOT DONE
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trait AppendBar {
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fn append_bar(self) -> Self;
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}
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impl AppendBar for String {
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// TODO: Implement `AppendBar` for type `String`.
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fn append_bar(self) -> String {
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format!("{}Bar", self)
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}
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}
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fn main() {
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@ -11,13 +11,16 @@
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// you can do this!
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// Execute `rustlings hint traits2` or use the `hint` watch subcommand for a hint.
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// I AM NOT DONE
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trait AppendBar {
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fn append_bar(self) -> Self;
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}
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// TODO: Implement trait `AppendBar` for a vector of strings.
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impl AppendBar for Vec<String> {
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fn append_bar(mut self) -> Vec<String> {
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self.push(String::from("Bar"));
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self
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}
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}
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#[cfg(test)]
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mod tests {
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@ -7,10 +7,10 @@
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// Consider what you can add to the Licensed trait.
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// Execute `rustlings hint traits3` or use the `hint` watch subcommand for a hint.
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// I AM NOT DONE
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pub trait Licensed {
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fn licensing_info(&self) -> String;
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fn licensing_info(&self) -> String {
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"Some information".to_string()
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}
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}
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struct SomeSoftware {
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@ -4,8 +4,6 @@
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// Don't change any line other than the marked one.
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// Execute `rustlings hint traits4` or use the `hint` watch subcommand for a hint.
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// I AM NOT DONE
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pub trait Licensed {
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fn licensing_info(&self) -> String {
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"some information".to_string()
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@ -20,7 +18,7 @@ impl Licensed for SomeSoftware {}
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impl Licensed for OtherSoftware {}
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// YOU MAY ONLY CHANGE THE NEXT LINE
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fn compare_license_types(software: ??, software_two: ??) -> bool {
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fn compare_license_types(software: impl Licensed, software_two: impl Licensed) -> bool {
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software.licensing_info() == software_two.licensing_info()
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}
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@ -4,8 +4,6 @@
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// Don't change any line other than the marked one.
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// Execute `rustlings hint traits5` or use the `hint` watch subcommand for a hint.
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// I AM NOT DONE
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pub trait SomeTrait {
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fn some_function(&self) -> bool {
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true
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@ -27,7 +25,7 @@ impl SomeTrait for OtherStruct {}
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impl OtherTrait for OtherStruct {}
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// YOU MAY ONLY CHANGE THE NEXT LINE
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fn some_func(item: ??) -> bool {
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fn some_func(item: impl SomeTrait + OtherTrait) -> bool {
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item.some_function() && item.other_function()
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}
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