feat(strings): add strings3

This commit is contained in:
mokou 2022-07-14 12:31:28 +02:00
parent f5e4c16eed
commit c1ed6b10fe
2 changed files with 52 additions and 0 deletions

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@ -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");
}
}

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@ -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]]