{"title":"Ruby \u914d\u5217\u306e\u7d5e\u308a\u8fbc\u307f\uff1aselect\u30fbreject\u30fbfind \u306e\u4f7f\u3044\u65b9","blog_title":"Engineering Tech Dojo","author_url":"https://blog.hatena.ne.jp/plarail_hangout/","provider_url":"https://hatena.blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftech.fun-toy-life.com%2Fentry%2F2026%2F06%2F30%2F215321\" title=\"Ruby \u914d\u5217\u306e\u7d5e\u308a\u8fbc\u307f\uff1aselect\u30fbreject\u30fbfind \u306e\u4f7f\u3044\u65b9 - Engineering Tech Dojo\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","categories":["Ruby"],"published":"2026-06-30 21:53:21","author_name":"plarail_hangout","width":"100%","type":"rich","height":"190","provider_name":"Hatena Blog","description":"Ruby \u914d\u5217\u306e\u7d5e\u308a\u8fbc\u307f\uff1aselect\u30fbreject\u30fbfind \u306e\u4f7f\u3044\u65b9 \u914d\u5217\u304b\u3089\u300c\u6761\u4ef6\u306b\u5408\u3046\u8981\u7d20\u3060\u3051\u53d6\u308a\u51fa\u3059\u300d\u306b\u306f select\u30fbreject\u30fbfind \u306a\u3069\u3092\u4f7f\u3044\u307e\u3059\u3002 \u65e9\u308f\u304b\u308a\u307e\u3068\u3081 \u30e1\u30bd\u30c3\u30c9 \u623b\u308a\u5024 \u5411\u3044\u3066\u3044\u308b\u7528\u9014 select / filter \u914d\u5217 \u6761\u4ef6\u306b\u5408\u3046\u8981\u7d20\u3092\u3059\u3079\u3066\u53d6\u308a\u51fa\u3059 reject \u914d\u5217 \u6761\u4ef6\u306b\u5408\u308f\u306a\u3044\u8981\u7d20\u3092\u3059\u3079\u3066\u53d6\u308a\u51fa\u3059 find / detect \u8981\u7d20 or nil \u6761\u4ef6\u306b\u5408\u3046\u6700\u521d\u306e\u8981\u7d20\u30921\u3064\u53d6\u308a\u51fa\u3059 find_index \u30a4\u30f3\u30c7\u30c3\u30af\u30b9 or nil \u6761\u4ef6\u306b\u5408\u3046\u6700\u521d\u306e\u8981\u7d20\u306e\u4f4d\u7f6e\u3092\u8abf\u3079\u308b any? boolean 1\u3064\u3067\u3082\u6761\u4ef6\u3092\u6e80\u305f\u3059\u304b\u78ba\u8a8d\u3059\u308b all? boolea\u2026","image_url":null,"url":"https://tech.fun-toy-life.com/entry/2026/06/30/215321","blog_url":"https://tech.fun-toy-life.com/","version":"1.0"}