{"description":"let\u3092\u4f7f\u3063\u3066\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u3092\u5b9a\u7fa9\u3067\u304d\u308b\u3002 \u30ed\u30fc\u30ab\u30eb\u5909\u6570\u306f\u3001\u4e00\u6642\u7684\u306b\u4f7f\u7528\u3059\u308b\u5909\u6570\u3067\u3001 \u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u3092\u4e00\u6642\u7684\u306b\u5909\u66f4\u3059\u308b \u306a\u304a\u3001let\u306f\u5165\u308c\u5b50\u306b\u3067\u304d\u308b\u3002let\u3092\u629c\u3051\u308b\u3068\u3001\u5916\u5074\u306e\u5024\u304c\u6709\u52b9\u306b\u306a\u308b\u3002\u307e\u305f\u3001let*\u306f\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u304c\u9806\u756a\u306b\u4ee3\u5165\u3055\u308c\u308b\u306e\u3067\u3001 \u76f4\u524d\u306e\u4ee3\u5165\u306e\u5f71\u97ff\u3092\u53d7\u3051\u308b\u4ee5\u4e0b\u3001let\u3068let*\u306e\u6319\u52d5\u3092\u78ba\u8a8d\u3059\u308b\u3002 (setq x 1) x ; => 1 (let ((x 2) null) ; \u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570x\u3092\u4e00\u6642\u7684\u306b\u5909\u66f4\u3059\u308b x ; => 2 null ; => nil ;; let\u306f\u5165\u308c\u5b50\u306b\u51fa\u6765\u308b (let ((x 3)) x) ; => 3 ) ;; let\u3092\u629c\u3051\u305f\u3089\u30b0\u30ed\u30fc\u30d0\u30eb\u306e\u5024\u306b\u306a\u308b x ;\u2026","image_url":"http://ecx.images-amazon.com/images/I/51Wg39T8KAL.jpg","url":"https://www.shigemk2.com/entry/20120408/1333872833","blog_title":"by shigemk2","provider_url":"https://hatena.blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fwww.shigemk2.com%2Fentry%2F20120408%2F1333872833\" title=\"let \u3068 let* - by shigemk2\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","published":"2012-04-08 17:13:53","width":"100%","provider_name":"Hatena Blog","version":"1.0","author_name":"shigemk2","type":"rich","categories":["Emacs Lisp"],"blog_url":"https://www.shigemk2.com/","author_url":"https://blog.hatena.ne.jp/shigemk2/","title":"let \u3068 let*","height":"190"}