{"height":"190","width":"100%","provider_url":"https://hatena.blog","image_url":null,"url":"https://kiririmode.hatenablog.jp/entry/20080712/p1","title":"\u554f\u984c3-41 (3.4.1  The Nature of Time in Concurrent Systems)","blog_title":"\u7406\u7cfb\u5b66\u751f\u65e5\u8a18","blog_url":"https://kiririmode.hatenablog.jp/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fkiririmode.hatenablog.jp%2Fentry%2F20080712%2Fp1\" title=\"\u554f\u984c3-41 (3.4.1  The Nature of Time in Concurrent Systems) - \u7406\u7cfb\u5b66\u751f\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>","type":"rich","author_name":"kiririmode","published":"2008-07-12 00:00:00","categories":["SICP"],"provider_name":"Hatena Blog","description":"Ben \u304c\u3053\u3053\u5909\u3048\u305f\u3089\u3057\u3044\u3093\u3060\u3051\u3069\uff0c (define (make-account balance) (define (withdraw amount) (if (>= balance amount) (begin (set! balance (- balance amount)) balance) \"Insufficient funds\")) (define (deposit amount) (set! balance (+ balance amount)) balance) ;; continued on next page (let ((protected (make-serializer\u2026","version":"1.0","author_url":"https://blog.hatena.ne.jp/kiririmode/"}