{"image_url":null,"author_url":"https://blog.hatena.ne.jp/tanakaBox/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fboxnos.hatenablog.com%2Fentry%2F20070627%2F1182936490\" title=\" SICP\u3092\u8aad\u3080(24) 1.2.3(3) \u5c40\u6240\u5909\u6570let - \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>","blog_url":"https://boxnos.hatenablog.com/","author_name":"tanakaBox","published":"2007-06-27 18:28:10","type":"rich","url":"https://boxnos.hatenablog.com/entry/20070627/1182936490","provider_url":"https://hatena.blog","blog_title":"\u30dc\u30af\u30ce\u30b9","categories":["Scheme"],"provider_name":"Hatena Blog","title":" SICP\u3092\u8aad\u3080(24) 1.2.3(3) \u5c40\u6240\u5909\u6570let","width":"100%","version":"1.0","height":"190","description":"\u3084\u3063\u3068\u300c\u5909\u6570\u300d\u3068\u3044\u3046\u7269\u304c\u767b\u5834\u3057\u307e\u3057\u305f\u3002let\u306e\u66f8\u5f0f\u306f (let binds body) \u3082\u3046\u3061\u3087\u3063\u3068\u8a73\u3057\u304f\u66f8\u304f\u3068 (let ((var exp) (var exp) ...) body) let\u306e\u4e2d\u306b\u56f2\u307e\u308c\u305f\u6587\u304c\u3001\u5909\u6570\u306e\u6709\u52b9\u7bc4\u56f2\u306b\u306a\u308b\u3002lambda\u306e\u30b7\u30f3\u30bf\u30c3\u30af\u30b9\u30b7\u30e5\u30ac\u30fc\u306a\u306e\u3067\u3001\u975e\u5e38\u306b\u308f\u304b\u308a\u3065\u3089\u3044\u3002 \u3067\u306f\u3001\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u30023\u3064\u306e\u5909\u6570\u5b9a\u7fa9\u3092\u898b\u6bd4\u3079\u3066\u307f\u308b\u3002 define\u6cd5 ; define\u6cd5 (define (f x y) (define (f-helpler a b) (+ (* x (square a)) (* y b) (* a b))) (f-helpler (+ 1 (* x y)) (- \u2026"}