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Fix string manipulation functions

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This commit is contained in:
Rock070 2023-12-30 16:49:44 +08:00
parent c0768cc4da
commit 13c442ec31
1 changed files with 7 additions and 5 deletions
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12
exercises/09_strings/strings3.rs
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@ -3,21 +3,23 @@
// Execute `rustlings hint strings3` or use the `hint` watch subcommand for a // Execute `rustlings hint strings3` or use the `hint` watch subcommand for a
// hint. // hint.
// I AM NOT DONE
fn trim_me(input: &str) -> String { fn trim_me(input: &str) -> String {
// TODO: Remove whitespace from both ends of a string! // TODO: Remove whitespace from both ends of a string!
??? input.trim().to_string()
} }
fn compose_me(input: &str) -> String { fn compose_me(input: &str) -> String {
// TODO: Add " world!" to the string! There's multiple ways to do this! // TODO: Add " world!" to the string! There's multiple ways to do this!
??? let mut s = String::new();
s.push_str(input);
s.push_str(" world!");
s
} }
fn replace_me(input: &str) -> String { fn replace_me(input: &str) -> String {
// TODO: Replace "cars" in the string with "balloons"! // TODO: Replace "cars" in the string with "balloons"!
??? input.replace("cars", "balloons")
} }
#[cfg(test)] #[cfg(test)]