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finish iterators2 exercise

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This commit is contained in:
lukaszKielar 2020-06-29 22:44:52 +02:00
parent 79b992dec4
commit 4582eda5cd
1 changed files with 4 additions and 5 deletions

9
exercises/standard_library_types/iterators2.rs
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@ -7,13 +7,11 @@
// Try to ensure it returns a single string. // Try to ensure it returns a single string.
// As always, there are hints if you execute `rustlings hint iterators2`! // As always, there are hints if you execute `rustlings hint iterators2`!
// I AM NOT DONE
pub fn capitalize_first(input: &str) -> String { pub fn capitalize_first(input: &str) -> String {
let mut c = input.chars(); let mut c = input.chars();
match c.next() { match c.next() {
None => String::new(), None => String::new(),
Some(first) => first.collect::<String>() + c.as_str(), Some(first) => first.to_uppercase().collect::<String>() + c.as_str(),
} }
} }
@ -37,14 +35,15 @@ mod tests {
#[test] #[test]
fn test_iterate_string_vec() { fn test_iterate_string_vec() {
let words = vec!["hello", "world"]; let words = vec!["hello", "world"];
let capitalized_words: Vec<String> = // TODO let capitalized_words: Vec<String> = words.into_iter().map(capitalize_first).collect();
assert_eq!(capitalized_words, ["Hello", "World"]); assert_eq!(capitalized_words, ["Hello", "World"]);
} }
#[test] #[test]
#[ignore]
fn test_iterate_into_string() { fn test_iterate_into_string() {
let words = vec!["hello", " ", "world"]; let words = vec!["hello", " ", "world"];
let capitalized_words = // TODO let capitalized_words = words.into_iter().map(capitalize_first).collect::<String>();
assert_eq!(capitalized_words, "Hello World"); assert_eq!(capitalized_words, "Hello World");
} }
} }