{"height":"190","type":"rich","blog_title":"kos31de.txt","categories":["\u6280\u8853\u30e1\u30e2"],"version":"1.0","provider_url":"https://hatena.blog","title":"select\u3068map","author_url":"https://blog.hatena.ne.jp/kos31de/","width":"100%","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fkos31de.hatenadiary.jp%2Fentry%2F2019%2F10%2F25%2F195934\" title=\"select\u3068map - kos31de.txt\" 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,"blog_url":"https://kos31de.hatenadiary.jp/","description":"\u914d\u5217\u306e\u4e2d\u3067\u6761\u4ef6\u306b\u5408\u81f4\u3059\u308b\u3082\u306e\u3092\u53d6\u3063\u3066\u304d\u3066\u304f\u308c\u308b\u306e\u304c\u3001select \u914d\u5217\u306e\u5404\u8981\u7d20\u304c\u6761\u4ef6\u306b\u5408\u81f4\u3059\u308b\u304b\u3069\u3046\u304b\u3001\u771f\u507d\u5024\u3092\u8fd4\u3059\u306e\u304c\u3001map irb(main):004:0> [\"1\", \"2\"].select {|i| i == \"1\"} => [\"1\"] irb(main):006:0> [\"1\", \"2\"].map {|i| i == \"1\"} => [true, false] select\u306e\u53cd\u5bfe\u306freject irb(main):005:0> [\"1\", \"2\"].reject {|i| i == \"1\"} => [\"2\"]","author_name":"kos31de","published":"2019-10-25 19:59:34","url":"https://kos31de.hatenadiary.jp/entry/2019/10/25/195934","provider_name":"Hatena Blog"}