{"width":"100%","provider_url":"https://hatena.blog","url":"https://ml-rand-note.hatenablog.com/entry/ruby/array-add-elements","title":"\u3010Ruby\u3011\u914d\u5217\u3078\u306e\u8981\u7d20\u306e\u8ffd\u52a0\u65b9\u6cd5\u307e\u3068\u3081","type":"rich","height":"190","author_url":"https://blog.hatena.ne.jp/round-rand/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fml-rand-note.hatenablog.com%2Fentry%2Fruby%2Farray-add-elements\" title=\"\u3010Ruby\u3011\u914d\u5217\u3078\u306e\u8981\u7d20\u306e\u8ffd\u52a0\u65b9\u6cd5\u307e\u3068\u3081 - \u30e9\u30f3\u30c9ML\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","blog_title":"\u30e9\u30f3\u30c9ML","author_name":"round-rand","description":"insert\uff1a\u4efb\u610f\u306e\u4f4d\u7f6e\u3078\u306e\u633f\u5165 unshift(prepend)\uff1a\u5148\u982d\u306b\u8ffd\u52a0 push(append)\uff1a\u672b\u5c3e\u306b1\u3064\u4ee5\u4e0a\u306e\u8981\u7d20\u3092\u8ffd\u52a0 <<\uff1a\u672b\u5c3e\u306b\u8981\u7d20\u30921\u3064\u8ffd\u52a0 concat\uff1a\u914d\u5217\u306e\u7d50\u5408 \u53c2\u8003 insert\uff1a\u4efb\u610f\u306e\u4f4d\u7f6e\u3078\u306e\u633f\u5165 insert(n, x) \u3067n\u756a\u76ee\u306bx\u3092\u633f\u5165\u3057\u307e\u3059\u3002 arr = [1, 2] # 1\u756a\u76ee\u306b0\u3092\u8ffd\u52a0 arr.insert(1, 0) p arr # => [1, 0, 2] # 2\u756a\u76ee\u306b4, 5\u3092\u8ffd\u52a0 arr.insert(2, 4, 5) p arr # => [1, 0, 4, 5, 2] unshift(prepend)\uff1a\u5148\u982d\u306b\u8ffd\u52a0 unshift(prepe\u2026","published":"2026-06-04 00:00:00","version":"1.0","categories":["Ruby"],"image_url":null,"provider_name":"Hatena Blog","blog_url":"https://ml-rand-note.hatenablog.com/"}