{"provider_url":"https://hatena.blog","description":"\u50d5\u306e\u89e3\u7b54 \u3053\u3093\u306a\u611f\u3058\u3002 (define (accumulate combiner null-value term a next b) (if (> a b) null-value (combiner (term a) (accumulate combiner null-value term (next a) next b)))) (define (sum term a next b) (accumulate + 0 term a next b)) (define (sum-integers a b) (sum (lambda (x) x) a (lambda (x) (+ x 1)) b)) \u2026","height":"190","title":" \u554f\u984c1.32","published":"2007-05-01 00:00:01","blog_url":"https://so-wh.at/","version":"1.0","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fso-wh.at%2Fentry%2F20070501%2Fp3\" title=\" \u554f\u984c1.32 - so what\" 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://so-wh.at/entry/20070501/p3","author_url":"https://blog.hatena.ne.jp/winebarrel/","blog_title":"so what","width":"100%","image_url":null,"provider_name":"Hatena Blog","type":"rich","categories":["SICP"],"author_name":"winebarrel"}