{"author_url":"https://blog.hatena.ne.jp/se-kichi/","blog_title":"\u304d\u3061\u3081\u3082","author_name":"se-kichi","provider_name":"Hatena Blog","height":"190","description":"ex4.19 \u30fb\u30fb\u30fb\u5b9f\u884c\u9806\u5e8f\u3001\u3068\u3044\u3046\u304bdefine\u306e\u66f8\u304f\u9806\u756a\u3092\u5909\u3048\u308c\u3070\u3001\u305d\u308c\u3063\u307d\u304f\u52d5\u304b\u3059\u3053\u3068\u3082\u6642\u306b\u306f\u3067\u304d\u308b\u3060\u308d\u3046\u304c\u3001\u4e00\u822c\u7684\u306a\u624b\u6cd5\u306f\u79c1\u306b\u306f\u3055\u3071\u30fc\u308a\u3067\u3059\u30fb\u30fb\u30fb\u3002 ex4.20 a (define (letrec-bindings exp) (cadr exp)) (define (letrec-body exp) (cddr exp)) (define variable-names '(*a* *b* *c* *d* *e* *f* *g*)) (define (letrec->derived-expression exp) (define (pick-up-element items n) ;;\u2026","image_url":null,"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fse-kichi.hatenadiary.org%2Fentry%2F20080916%2F1221581788\" title=\"exercise 4.19~21 - \u304d\u3061\u3081\u3082\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","categories":["SICP","exercise"],"url":"https://se-kichi.hatenadiary.org/entry/20080916/1221581788","provider_url":"https://hatena.blog","title":"exercise 4.19~21","version":"1.0","type":"rich","blog_url":"https://se-kichi.hatenadiary.org/","published":"2008-09-16 01:16:28","width":"100%"}