{"provider_url":"https://hatena.blog","blog_title":"\u7406\u7cfb\u5b66\u751f\u65e5\u8a18","published":"2008-08-23 00:00:02","type":"rich","categories":["SICP"],"title":"\u554f\u984c3-54 (3.5.2 Infinite Streams)","url":"https://kiririmode.hatenablog.jp/entry/20080823/p3","provider_name":"Hatena Blog","author_url":"https://blog.hatena.ne.jp/kiririmode/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fkiririmode.hatenablog.jp%2Fentry%2F20080823%2Fp3\" title=\"\u554f\u984c3-54 (3.5.2 Infinite Streams) - \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>","width":"100%","version":"1.0","author_name":"kiririmode","image_url":null,"description":"\u76ee\u7684\u306f n \u756a\u76ee\u306e\u8981\u7d20\u304c \u306b\u306a\u308b\u3088\u3046\u306a\u7121\u9650\u30b9\u30c8\u30ea\u30fc\u30e0 factorials \u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\uff0e \u307e\u305a\u306f\uff0c2 \u3064\u306e\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u639b\u3051\u5408\u308f\u305b\u308b \u307e\u305a\u306f\uff0c2 \u3064\u306e\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u639b\u3051\u5408\u308f\u305b\u3066\uff0c\u65b0\u3057\u3044\u7121\u9650\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u4f5c\u308b\u3088\u3046\u306a\u95a2\u6570 mul-stream \u3092\u3053\u3055\u3048\u307e\u3059\uff0e (define (mul-stream s1 s2) (stream-map * s1 s2)) \u3053\u3055\u3048\u308b\u3068\u8a00\u3063\u3066\u3082\uff0cadd-stream \u306e\u6f14\u7b97\u5b50\u3092\u5909\u3048\u305f\u3060\u3051\u3060\u3057\uff0c\u3053\u306e\u3042\u305f\u308a\u306b\u306a\u308b\u3068 add-stream \u3068 mul-stream \u306e\u5171\u901a\u90e8\u5206\u3092\u62ec\u308a\u51fa\u3057\u3066\u3082\u3088\u3055\u305d\u3046\u306a\u6c17\u304c\u3057\u307e\u3059\u306d! SICP \u3067\u3082\u305f\u3057\u304b\u7b2c\u4e00\u7ae0\u3067\u4f3c\u305f\u3088\u3046\u306a\u8a71\u3092\u3084\u3063\u3066\u305f\u306a\u30fc\uff0e \u305d\u3057\u2026","height":"190","blog_url":"https://kiririmode.hatenablog.jp/"}