strings 3 solution

This commit is contained in:
mo8it 2024-06-22 12:22:24 +02:00
parent f574905b8e
commit 613ec23f84
3 changed files with 62 additions and 11 deletions

View file

@ -1,16 +1,13 @@
fn trim_me(input: &str) -> String {
// TODO: Remove whitespace from both ends of a string!
???
fn trim_me(input: &str) -> &str {
// TODO: Remove whitespace from both ends of a string.
}
fn compose_me(input: &str) -> String {
// TODO: Add " world!" to the string! There are multiple ways to do this!
???
// TODO: Add " world!" to the string! There are multiple ways to do this.
}
fn replace_me(input: &str) -> String {
// TODO: Replace "cars" in the string with "balloons"!
???
// TODO: Replace "cars" in the string with "balloons".
}
fn main() {
@ -36,7 +33,13 @@ mod tests {
#[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");
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",
);
}
}

View file

@ -499,7 +499,8 @@ https://doc.rust-lang.org/stable/book/ch15-02-deref.html#implicit-deref-coercion
name = "strings3"
dir = "09_strings"
hint = """
There's tons of useful standard library functions for strings. Let's try and use some of them:
There are many useful standard library functions for strings. Let's try and use
some of them:
https://doc.rust-lang.org/std/string/struct.String.html#method.trim
For the `compose_me` method: You can either use the `format!` macro, or convert

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@ -1 +1,48 @@
// Solutions will be available before the stable release. Thank you for testing the beta version 🥰
fn trim_me(input: &str) -> &str {
input.trim()
}
fn compose_me(input: &str) -> String {
// The macro `format!` has the same syntax as `println!`, but it returns a
// string instead of printing it to the terminal.
// Equivalent to `input.to_string() + " world!"`
format!("{input} world!")
}
fn replace_me(input: &str) -> String {
input.replace("cars", "balloons")
}
fn main() {
// You can optionally experiment here.
}
#[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",
);
}
}