{"published":"2026-06-30 20:26:00","author_name":"plarail_hangout","url":"https://tech.fun-toy-life.com/entry/2026/06/30/202600","version":"1.0","type":"rich","title":"JavaScript \u914d\u5217\u306e\u7d5e\u308a\u8fbc\u307f\uff1afilter\u30fbfind\u30fbsome \u306e\u4f7f\u3044\u65b9","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%2F202600\" title=\"JavaScript \u914d\u5217\u306e\u7d5e\u308a\u8fbc\u307f\uff1afilter\u30fbfind\u30fbsome \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>","blog_title":"Engineering Tech Dojo","blog_url":"https://tech.fun-toy-life.com/","image_url":null,"categories":["JavaScript"],"width":"100%","author_url":"https://blog.hatena.ne.jp/plarail_hangout/","height":"190","description":"JavaScript \u914d\u5217\u306e\u7d5e\u308a\u8fbc\u307f\uff1afilter\u30fbfind\u30fbsome \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 filter\u30fbfind\u30fbfindIndex\u30fbsome\u30fbevery \u3092\u4f7f\u3044\u307e\u3059\u3002\u4f55\u3092\u78ba\u8a8d\u3057\u305f\u3044\u304b\u306b\u3088\u3063\u3066\u4f7f\u3044\u5206\u3051\u307e\u3059\u3002 \u65e9\u308f\u304b\u308a\u307e\u3068\u3081 \u30e1\u30bd\u30c3\u30c9 \u623b\u308a\u5024 \u5411\u3044\u3066\u3044\u308b\u7528\u9014 filter \u65b0\u3057\u3044\u914d\u5217 \u6761\u4ef6\u306b\u5408\u3046\u8981\u7d20\u3092\u3059\u3079\u3066\u53d6\u308a\u51fa\u3059 find \u8981\u7d20 or undefined \u6761\u4ef6\u306b\u5408\u3046\u6700\u521d\u306e\u8981\u7d20\u30921\u3064\u53d6\u308a\u51fa\u3059 findIndex \u30a4\u30f3\u30c7\u30c3\u30af\u30b9 or -1 \u6761\u4ef6\u306b\u5408\u3046\u6700\u521d\u306e\u8981\u7d20\u306e\u4f4d\u7f6e\u3092\u8abf\u3079\u308b some boolean 1\u3064\u3067\u3082\u6761\u4ef6\u3092\u6e80\u305f\u3059\u304b\u78ba\u8a8d\u3059\u308b every boolean \u3059\u2026","provider_name":"Hatena Blog"}