2022-02-23 00:49:02 -06:00
|
|
|
# Iterator
|
2022-02-26 23:01:40 -06:00
|
|
|
|
|
|
|
|
```rust,editable
|
|
|
|
|
// (all the type annotations are superfluous)
|
|
|
|
|
// A reference to a string allocated in read only memory
|
|
|
|
|
let pangram: &'static str = "the quick brown fox jumps over the lazy dog";
|
|
|
|
|
println!("Pangram: {}", pangram);
|
|
|
|
|
|
|
|
|
|
// Iterate over words in reverse, no new string is allocated
|
|
|
|
|
println!("Words in reverse");
|
|
|
|
|
for word in pangram.split_whitespace().rev() {
|
|
|
|
|
println!("> {}", word);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// Copy chars into a vector, sort and remove duplicates
|
|
|
|
|
let mut chars: Vec<char> = pangram.chars().collect();
|
|
|
|
|
chars.sort();
|
|
|
|
|
chars.dedup();
|
|
|
|
|
```
|
