[*0...5] #=> [0, 1, 2, 3, 4]
スター (*) での式展開はよく知られてるけど、この式展開は to_a が定義されているオブジェクトならなんにでも使えることを知った。
[23] pry(main)> String.class_eval { def to_a; self.split(''); end }
=> nil
[24] pry(main)> [*'abcde']
=> ["a", "b", "c", "d", "e"]
More than 5 years have passed since last update.
Register as a new user and use Qiita more conveniently
- You get articles that match your needs
- You can efficiently read back useful information
- You can use dark theme
List of users who liked
2419