{"categories":["SICP"],"height":"190","version":"1.0","author_name":"tmurata","type":"rich","width":"100%","blog_title":"tmurata\u306e\u65e5\u8a18","author_url":"https://blog.hatena.ne.jp/tmurata/","description":"set-variable-value!, define-variable!\u304a\u3088\u3073lookup-variable-value\u304b\u3089\u5171\u901a\u30d1\u30bf\u30fc\u30f3\u3092\u53d6\u308a\u8fbc\u3093\u3060\u62bd\u8c61\u306e\u5b9a\u7fa9\u3002 define-variable!\u3068\u6b21\u306e\u554f\u984c\u307e\u3067\u542b\u3081\u3066\u8003\u3048\u3066\u3001\u624b\u7d9a\u304d\u3092\u6e21\u305b\u308b\u3088\u3046\u306b\u3057\u3066\u304a\u304f\u3002 (define (scan var vars vals proc) (cond ((null? vars) #f) ((eq? var (car vars)) (proc vars vals)) (else (scan var (cdr vars) (cdr vals) proc)))) (define (scan-env-loop var \u2026","provider_url":"https://hatena.blog","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftmurata.hatenadiary.org%2Fentry%2F20100318%2F1268913401\" title=\"SICP\u554f\u984c4.12 - tmurata\u306e\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>","url":"https://tmurata.hatenadiary.org/entry/20100318/1268913401","published":"2010-03-18 20:56:41","image_url":null,"title":"SICP\u554f\u984c4.12","blog_url":"https://tmurata.hatenadiary.org/"}