{"blog_url":"https://hkdnet.hatenablog.com/","url":"https://hkdnet.hatenablog.com/entry/2017/01/21/005707","description":"\u3069\u3046\u3059\u308b\u306e\u304c\u3044\u3044\u3093\u3067\u3057\u3087\u3046\u304b\u3002 \u30e1\u30e2\u30ea\u3068\u304b\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u304b\u305d\u3046\u3044\u3046\u306e\u306f\u3042\u3093\u307e\u308a\u6c17\u306b\u3057\u306a\u3044\u524d\u63d0\u3067\u3059\u3002 \u4ee5\u4e0b\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u306f\u5bfe\u8c61\u306eEnumerable\u306f\u5909\u6570 arr \u306b\u4ee3\u5165\u3055\u308c\u3066\u3044\u308b\u3082\u306e\u3068\u3057\u3001\u6761\u4ef6X\u3092\u6e80\u305f\u3059\u304b\u3069\u3046\u304b\u306e\u30e1\u30bd\u30c3\u30c9\u306f foo?(x) \u3068\u3044\u3046\u540d\u524d\u3067\u3042\u308b\u3068\u3057\u307e\u3059*1\u3002 \u666e\u901a\u306b\u66f8\u304f a = arr.select { |e| foo?(e) } b = arr.select { |e| !foo?(e) } \u6392\u4ed6\u7684\u306b\u5206\u3051\u305f\u3044\u306e\u306b\u30d6\u30ed\u30c3\u30af\u304c2\u56de\u66f8\u304b\u308c\u3066\u3044\u308b\u3002 \u6761\u4ef6\u306b\u5909\u66f4\u304c\u3042\u3063\u305f\u5834\u5408\u306e\u5909\u66f4\u6f0f\u308c\u3001\u3046\u3063\u304b\u308a ! \u3064\u3051\u5fd8\u308c\u308b\u306a\u3069\u306e\u30df\u30b9\u3092\u3084\u308a\u305d\u3046\u3002\u5fae\u5999\u3002 select\u3068reject\u3059\u308b a = arr\u2026","image_url":null,"type":"rich","provider_name":"Hatena Blog","title":"Ruby\u3067Enumerable\u3092\u6761\u4ef6X\u3092\u6e80\u305f\u3059\u3082\u306e\u3068\u6e80\u305f\u3055\u306a\u3044\u3082\u306e\u306b\u6392\u4ed6\u7684\u306b\u5206\u3051\u305f\u3044\u3093\u3060\u3051\u3069","author_url":"https://blog.hatena.ne.jp/hkdnet/","version":"1.0","published":"2017-01-21 00:57:07","author_name":"hkdnet","width":"100%","height":"190","provider_url":"https://hatena.blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fhkdnet.hatenablog.com%2Fentry%2F2017%2F01%2F21%2F005707\" title=\"Ruby\u3067Enumerable\u3092\u6761\u4ef6X\u3092\u6e80\u305f\u3059\u3082\u306e\u3068\u6e80\u305f\u3055\u306a\u3044\u3082\u306e\u306b\u6392\u4ed6\u7684\u306b\u5206\u3051\u305f\u3044\u3093\u3060\u3051\u3069 - Smoky God Express\" 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":"Smoky God Express","categories":["\u6280\u8853\u7cfb\u65e5\u8a18","Ruby"]}