#配列の中に値を追加。
a = [1, 2, 3]
a.insert(2, "a") => [1, 2, "a", 3]
(2, "a")の第一引数（2）が何番目に追加するか、第二引数が何を入れるかとなる。
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