{"title":"let*\u3068\u540d\u524d\u4ed8\u304dlet\u3092\u30de\u30af\u30ed\u3067","blog_title":"\u307f\u305a\u3074\u30fc\u65e5\u8a18","author_name":"mzp","provider_url":"https://hatena.blog","author_url":"https://blog.hatena.ne.jp/mzp/","version":"1.0","image_url":null,"type":"rich","height":"190","description":"30\u5206\u30d7\u30ed\u30b0\u30e9\u30e0\u3001\u305d\u306e681\u3002let*\u3068\u540d\u524d\u4ed8\u304dlet\u3092\u30de\u30af\u30ed\u3067\u66f8\u3044\u3066\u307f\u307e\u3057\u305f\u3002 \u8f2a\u8b1b\u306e\u305f\u3081\u306bSICP\u306e\u6f14\u7fd2\u554f\u984c\u3092\u89e3\u3044\u3066\u305f\u3089\u3001\u300clet*\u3068\u540d\u524d\u4ed8\u304dlet\u3092\u30b3\u30fc\u30c9\u5909\u63db\u3067\u5b9f\u73fe\u3057\u308d\u300d\u3068\u3044\u3046\u306e\u304c\u3067\u3066\u304d\u307e\u3057\u305f\u3002 \u305d\u306e\u3068\u304d\u3001\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u304c\u4f7f\u3048\u306a\u304f\u3066\u30d5\u30e9\u30b9\u30c8\u30ec\u30fc\u30b7\u30e7\u30f3\u304c\u6e9c\u308a\u307e\u304f\u3063\u305f\u306e\u3067\u3001\u30de\u30af\u30ed\u3067\u518d\u5b9f\u88c5\u3057\u307e\u3057\u305f\u3002 \u3067\u3082\u3001\u30de\u30af\u30ed\u3060\u3068\u5f15\u6570\u306e\u90e8\u5206\u3067(\u7c21\u6613\u7684\u306a)\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u304c\u4f7f\u3048\u308b\u306e\u3067\u3001util.match\u306f\u3042\u3093\u307e\u308a\u4f7f\u3044\u307e\u305b\u3093\u3067\u3057\u305f\u3002 \u4f7f\u3044\u65b9 ;; let*\u306e\u4f8b (my-let* ((x 3) (y (+ x 2))) (+ x y)) ;; \u540d\u524d\u4ed8\u304dlet (define (fib n) (my-let fib\u2026","blog_url":"https://mzp.hatenadiary.org/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fmzp.hatenadiary.org%2Fentry%2F20091021%2Flet\" title=\"let*\u3068\u540d\u524d\u4ed8\u304dlet\u3092\u30de\u30af\u30ed\u3067 - \u307f\u305a\u3074\u30fc\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","url":"https://mzp.hatenadiary.org/entry/20091021/let","categories":["Scheme","30\u5206\u30d7\u30ed\u30b0\u30e9\u30e0"],"width":"100%","provider_name":"Hatena Blog","published":"2009-10-21 00:00:00"}