{"published":"2008-02-05 00:00:00","author_url":"https://blog.hatena.ne.jp/propella/","image_url":null,"provider_url":"https://hatena.blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fpropella.hatenablog.com%2Fentry%2F20080205%2Fp1\" title=\" \u4ffa\u69d8\u8a00\u8a9e Lazy \u3092\u4f5c\u308b\u3002\u305d\u306e\uff16\u3002\u795d\uff01\u9045\u5ef6\u8a55\u4fa1\u5b8c\u6210\uff01 - \u8a00\u8a9e\u30b2\u30fc\u30e0\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","categories":["lazy"],"author_name":"propella","version":"1.0","url":"https://propella.hatenablog.com/entry/20080205/p1","blog_title":"\u8a00\u8a9e\u30b2\u30fc\u30e0","title":" \u4ffa\u69d8\u8a00\u8a9e Lazy \u3092\u4f5c\u308b\u3002\u305d\u306e\uff16\u3002\u795d\uff01\u9045\u5ef6\u8a55\u4fa1\u5b8c\u6210\uff01","type":"rich","blog_url":"https://propella.hatenablog.com/","height":"190","width":"100%","provider_name":"Hatena Blog","description":"\u5b9f\u884c\u74b0\u5883: http://languagegame.org/pub/lazy/Lazy.html \u30bd\u30fc\u30b9\u30b3\u30fc\u30c9: http://languagegame.org/dev/!svn/bc/32/trunk/lazy/Lazy.js (343 \u884c) \u5c48\u6298\u56db\u30f6\u6708\u3002\u3084\u308a\u307e\u3057\u305f\uff01\u3088\u3046\u3084\u304f\u6700\u521d\u306e\u76ee\u7684\u3060\u3063\u305f\u9045\u5ef6\u8a55\u4fa1\u304c\u5b8c\u6210\u3057\u307e\u3057\u305f\uff01\u3057\u3093\u3069\u3044\u306e\u3067\u30e1\u30e2\u3060\u3051\u3002\u307b\u3068\u3093\u3069 SICP 4.1 \u7ae0\u3068\u540c\u3058\u3084\u308a\u65b9\u3067\u3059\u3002 \u95a2\u6570\u3092\u9069\u7528\u3059\u308b\u969b\u306b\u3001\u5f15\u6570\u3092\u8a55\u4fa1\u305b\u305a Thunk \u3068\u3044\u3046\u7269\u3067\u5305\u3080\u3002\u30b5\u30f3\u30af = \u5f0f + \u74b0\u5883 Thunk \u306f force \u3068\u8a00\u3046\u30e1\u30bd\u30c3\u30c9\u3067\u518d\u5e30\u7684\u306b\u4e2d\u3092 force \u3057\u5024\u3092\u53d6\u308a\u51fa\u3059\u3002 \u95a2\u6570\u3092\u9069\u7528\u3059\u308b\u969b\u306b\u3001\u95a2\u6570\u81ea\u4f53\u306f \u2026"}