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chars関数は文字列をなめるイテレータ(Iterator<Item = char>)を生成する
chars
Iterator<Item = char>
fn main() { let s = String::from("HogeFoo"); println!("{:?}", s.chars()); // Chars(['H','o','g','e','F','o','o']) for ch in s.chars() { print!("{}", ch); // HogeFoo } }
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