{"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fboxnos.hatenablog.com%2Fentry%2F20080422%2F1208863689\" title=\" SICP\u3092\u8aad\u3080(90) \u554f\u984c3.1 - 3.4 - \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>","title":" SICP\u3092\u8aad\u3080(90) \u554f\u984c3.1 - 3.4","provider_url":"https://hatena.blog","description":"\u7c21\u5358\u3060\u3063\u305f\u306e\u3067\u3001\u3084\u3063\u3061\u307e\u304a\u3046\u3002 \u554f\u984c 3.1 \u30a2\u30ad\u30e5\u30e0\u30ec\u30fc\u30bf\u3092\u4f5c\u308c\u3002 (define ((make-accumulator n) x) (set! n (+ n x)) n) (define A (make-accumulator 5)) (A 10) ; 15 (A 10) ; 25 lambda\u30a4\u30e9\u30cd\u30fc\u3002 \u554f\u984c 3.2 \u3053\u308c\u306f\u9762\u767d\u3044\u3002\u95a2\u6570\u306e\u547c\u3073\u51fa\u3057\u56de\u6570\u3092\u6570\u3048\u308b\u554f\u984c\u3002 (define (make-monitored f) (let ((n 0)) (lambda x (if (equal? x '(how-many-calls?)) n (begin (set! n (+ n 1)) (ap\u2026","author_name":"tanakaBox","blog_url":"https://boxnos.hatenablog.com/","version":"1.0","provider_name":"Hatena Blog","blog_title":"\u30dc\u30af\u30ce\u30b9","author_url":"https://blog.hatena.ne.jp/tanakaBox/","image_url":null,"type":"rich","height":"190","url":"https://boxnos.hatenablog.com/entry/20080422/1208863689","width":"100%","categories":["Scheme"],"published":"2008-04-22 20:28:09"}