{"provider_url":"https://hatena.blog","type":"rich","title":"Ruby\u306eNumbered parameters\u306b\u3064\u3044\u3066","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fkamatimaru.hatenablog.com%2Fentry%2F2026%2F01%2F04%2F001515\" title=\"Ruby\u306eNumbered parameters\u306b\u3064\u3044\u3066 - delhi09\u306e\u52c9\u5f37\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","image_url":null,"author_url":"https://blog.hatena.ne.jp/kamatimaru/","width":"100%","categories":["Ruby"],"url":"https://kamatimaru.hatenablog.com/entry/2026/01/04/001515","published":"2026-01-04 00:15:15","description":"Ruby2.7\u3067Numbered parameters\u3068\u3044\u3046\u6a5f\u80fd\u304c\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u3002 github.com \u30d6\u30ed\u30c3\u30af\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u7701\u7565\u3057\u3066\u66f8\u3051\u308b\u3068\u3044\u3046\u3082\u306e\u3067\u3059\u3002 Numbered parameters\u3092\u4f7f\u308f\u306a\u3044\u5834\u5408 [1, 2, 3].map {|n| n * 2} # [2, 4, 6] Numbered parameters\u3092\u4f7f\u3046\u5834\u5408 |n|\u3092\u7701\u7565\u3057\u3066\u65e2\u306b_1\u3068\u3044\u3046\u5909\u6570\u306b\u914d\u5217\u306e\u5404\u8981\u7d20\u304c\u4ee3\u5165\u6e08\u307f\u306e\u3082\u306e\u3068\u3057\u3066\u6271\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 [1, 2, 3].map {_1 * 2} # [2, 4, 6] \u3053\u306e\u8a18\u6cd5\u306b\u8208\u5473\u3092\u6301\u3063\u305f\u304d\u3063\u304b\u3051 \u3053\u306e\u3088\u3046\u306a\u7701\u7565\u8a18\u6cd5\u304c\u3042\u308b\u3068\u3044\u3046\u3053\u3068\u306fRuby\u306e\u5165\u9580\u66f8\u3067\u2026","height":"190","blog_url":"https://kamatimaru.hatenablog.com/","author_name":"kamatimaru","version":"1.0","blog_title":"delhi09\u306e\u52c9\u5f37\u65e5\u8a18"}