{"image_url":null,"published":"2008-02-02 05:20:47","height":"190","version":"1.0","width":"100%","url":"https://boxnos.hatenablog.com/entry/20080202/1201897247","description":"PHP \u3067 Y\u30b3\u30f3\u30d3\u30cd\u30fc\u30bf boolean\u3068if\u6587\u3082\u5168\u90e8\u95a2\u6570\u3060\u3051\u3067\u5b9f\u73fe\u3067\u304d\u3061\u3083\u3063\u305f\u3002 \u3084\u3063\u3066\u307f\u305f\u3002 gosh> (define (true x y) x) true gosh> (define (false x y) y) false gosh> (define (if f x y) (f x y)) if gosh> (if true 1 2) 1 gosh> (if false 1 2) 2\u30db\u30f3\u30c8\u30c0\u3002lambda\u3060\u3051\u306b\u3059\u308b\u3002 gosh> ((lambda (f x y) (f x y)) (lambda (x y) x) 1 2) 1 gosh> ((lambda (f x y) (f x\u2026","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fboxnos.hatenablog.com%2Fentry%2F20080202%2F1201897247\" title=\" if\u306e\u518d\u5b9a\u7fa9 - \u30dc\u30af\u30ce\u30b9\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_url":"https://blog.hatena.ne.jp/tanakaBox/","author_name":"tanakaBox","type":"rich","blog_url":"https://boxnos.hatenablog.com/","categories":["Scheme"],"blog_title":"\u30dc\u30af\u30ce\u30b9","provider_url":"https://hatena.blog","title":" if\u306e\u518d\u5b9a\u7fa9"}