{"height":"190","provider_name":"Hatena Blog","provider_url":"https://hatena.blog","description":"mutable pair \u306e\u30c6\u30b9\u30c8\u3092\u5b9f\u884c\u3057\u3066\u3044\u305f\u3089\u30cd\u30a4\u30c6\u30a3\u30d6\u306e\u30b9\u30bf\u30c3\u30af\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u306b\u3002 \u3053\u308c\u306f\u304b\u306e\u6709\u540d\u306a\u5faa\u74b0\u69cb\u9020\u306b\u304a\u3051\u308b equal? \u306e\u505c\u6b62\u6027\u554f\u984c\u3058\u3083\u306a\u3044\u3067\u3059\u304b\u3002 \u3053\u3046\u3044\u3046\u30b1\u30fc\u30b9\u306fR5RS\u3067\u306f\u505c\u6b62\u3057\u306a\u304f\u3066\u3082\u5225\u306b\u3088\u3044\u306e\u3067\u3059\u304c\u3001R6RS\u3067\u306f\u660e\u78ba\u306b\u505c\u6b62\u3059\u308b\u3068\u6c7a\u307e\u3063\u3066\u308b\u3002 (let ((x (list 'a 'b 'c 'a)) (y (list 'a 'b 'c 'a 'b 'c 'a))) (set-cdr! (list-tail x 2) x) (set-cdr! (list-tail y 5) y) (equal? x y)) \u3061\u306a\u307f\u306bGauche \u306f\u505c\u6b62\u3057\u307e\u305b\u3093\u3002\uff08R5RS\u3060\u304b\u3089\u6b63\u3057\u3044\u52d5\u2026","published":"2008-08-18 23:13:15","author_name":"higepon","version":"1.0","blog_url":"https://higepon.hatenablog.com/","type":"rich","image_url":null,"width":"100%","blog_title":"higepon blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fhigepon.hatenablog.com%2Fentry%2F20080818%2F1219068795\" title=\" R6RS \u306e equal? \u306e\u505c\u6b62\u6027\u306b\u3064\u3044\u3066 - higepon blog\" 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://higepon.hatenablog.com/entry/20080818/1219068795","author_url":"https://blog.hatena.ne.jp/higepon/","categories":["scheme","r6rs"],"title":" R6RS \u306e equal? \u306e\u505c\u6b62\u6027\u306b\u3064\u3044\u3066"}