From c1ed6b10fe0725846fef8328b328159b6302fe3b Mon Sep 17 00:00:00 2001 From: mokou Date: Thu, 14 Jul 2022 12:31:28 +0200 Subject: [PATCH] feat(strings): add strings3 --- exercises/strings/strings3.rs | 41 +++++++++++++++++++++++++++++++++++ info.toml | 11 ++++++++++ 2 files changed, 52 insertions(+) create mode 100644 exercises/strings/strings3.rs diff --git a/exercises/strings/strings3.rs b/exercises/strings/strings3.rs new file mode 100644 index 0000000..bb0a259 --- /dev/null +++ b/exercises/strings/strings3.rs @@ -0,0 +1,41 @@ +// strings3.rs +// Execute `rustlings hint strings3` or use the `hint` watch subcommand for a hint. + +fn trim_me(input: &str) -> String { + // TODO: Remove whitespace from the end of a string! + ??? +} + +fn compose_me(input: &str) -> String { + // TODO: Add " world!" to the string! There's multiple ways to do this! + ??? +} + +fn replace_me(input: &str) -> String { + // TODO: Replace "cars" in the string with "balloons"! + ??? +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn trim_a_string() { + assert_eq!(trim_me("Hello! "), "Hello!"); + assert_eq!(trim_me(" What's up!"), "What's up!"); + assert_eq!(trim_me(" Hola! "), "Hola!"); + } + + #[test] + fn compose_a_string() { + assert_eq!(compose_me("Hello"), "Hello world!"); + assert_eq!(compose_me("Goodbye"), "Goodbye world!"); + } + + #[test] + fn replace_a_string() { + assert_eq!(replace_me("I think cars are cool"), "I think balloons are cool"); + assert_eq!(replace_me("I love to look at cars"), "I love to look at balloons"); + } +} diff --git a/info.toml b/info.toml index 8174fc8..c54672b 100644 --- a/info.toml +++ b/info.toml @@ -443,6 +443,17 @@ Yes, it would be really easy to fix this by just changing the value bound to `wo string slice instead of a `String`, wouldn't it?? There is a way to add one character to line 9, though, that will coerce the `String` into a string slice.""" +[[exercises]] +name = "strings3" +path = "exercises/strings/strings3.rs" +mode = "test" +hint = """ +There's tons of useful standard library functions for strings. Let's try and use some of +them! + +For the compose_me method: You can either use the `format!` macro, or convert the string +slice into an owned string, which you can then freely extend.""" + # MODULES [[exercises]]