{"categories":["Ruby"],"provider_url":"https://hatena.blog","image_url":null,"height":"190","description":"Ruby \u30cf\u30c3\u30b7\u30e5\u306e\u7e70\u308a\u8fd4\u3057\uff1aeach\u30fbmap\u30fbselect \u306e\u4f7f\u3044\u65b9 \u30cf\u30c3\u30b7\u30e5\u306e\u30ad\u30fc\u3068\u5024\u3092\u7e70\u308a\u8fd4\u3057\u51e6\u7406\u3059\u308b\u306b\u306f each\u30fbmap\u30fbselect \u306a\u3069\u3092\u4f7f\u3044\u307e\u3059\u3002\u914d\u5217\u3068\u307b\u307c\u540c\u3058\u30e1\u30bd\u30c3\u30c9\u304c\u4f7f\u3048\u307e\u3059\u3002 \u65e9\u308f\u304b\u308a\u307e\u3068\u3081 \u30e1\u30bd\u30c3\u30c9 \u623b\u308a\u5024 \u5411\u3044\u3066\u3044\u308b\u7528\u9014 each self \u30ad\u30fc\u3068\u5024\u3092\u7e70\u308a\u8fd4\u3057\u51e6\u7406\u3059\u308b map / collect \u914d\u5217 \u5909\u63db\u3057\u305f\u914d\u5217\u3092\u4f5c\u308b select / filter \u30cf\u30c3\u30b7\u30e5 \u6761\u4ef6\u306b\u5408\u3046\u30da\u30a2\u3092\u53d6\u308a\u51fa\u3059 reject \u30cf\u30c3\u30b7\u30e5 \u6761\u4ef6\u306b\u5408\u308f\u306a\u3044\u30da\u30a2\u3092\u53d6\u308a\u51fa\u3059 transform_values \u30cf\u30c3\u30b7\u30e5 \u5024\u3060\u3051\u5909\u63db\u3057\u305f\u30cf\u30c3\u30b7\u30e5\u3092\u4f5c\u308b transform_keys \u30cf\u30c3\u30b7\u30e5 \u30ad\u30fc\u3060\u3051\u5909\u63db\u3057\u2026","width":"100%","author_name":"plarail_hangout","blog_url":"https://tech.fun-toy-life.com/","url":"https://tech.fun-toy-life.com/entry/2026/06/30/215325","author_url":"https://blog.hatena.ne.jp/plarail_hangout/","type":"rich","title":"Ruby \u30cf\u30c3\u30b7\u30e5\u306e\u7e70\u308a\u8fd4\u3057\uff1aeach\u30fbmap\u30fbselect \u306e\u4f7f\u3044\u65b9","published":"2026-06-30 21:53:25","version":"1.0","blog_title":"Engineering Tech Dojo","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftech.fun-toy-life.com%2Fentry%2F2026%2F06%2F30%2F215325\" title=\"Ruby \u30cf\u30c3\u30b7\u30e5\u306e\u7e70\u308a\u8fd4\u3057\uff1aeach\u30fbmap\u30fbselect \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>"}