{"type":"rich","url":"https://www.shigemk2.com/entry/20120409/1333914073","height":"190","author_url":"https://blog.hatena.ne.jp/shigemk2/","categories":["Emacs Lisp"],"provider_name":"Hatena Blog","image_url":"http://ecx.images-amazon.com/images/I/51Wg39T8KAL.jpg","width":"100%","description":"if\u306f1\u3064\u306e\u30d5\u30a9\u30fc\u30e0\u3057\u304b\u7f6e\u3051\u306a\u3044\u306e\u3067\u3001progn\u3068\u4f75\u7528\u3059\u308b\u3053\u3068\u3067 \u8907\u6570\u306e\u30d5\u30a9\u30fc\u30e0\u3092\u7f6e\u3051\u308b\u304c\u3001 if+progn\u3088\u308a\u3082\u3001cond\u3092\u4f7f\u3063\u305f\u307b\u3046\u304c\u30b9\u30de\u30fc\u30c8\u3002 (cond (\u6761\u4ef6\u5f0f \u771f\u30d5\u30a9\u30fc\u30e01 \u771f\u30d5\u30a9\u30fc\u30e02 ..) (t \u507d\u30d5\u30a9\u30fc\u30e01 \u507d\u30d5\u30a9\u30fc\u30e02 ..)) \u8fd4\u308a\u5024\u306f\u3001\u6700\u5f8c\u306b\u8a55\u4fa1\u3057\u305f\u30d5\u30a9\u30fc\u30e0;;if\u3068progn\u3092cond\u306b\u7f6e\u304d\u5909\u3048\u308b\u3068\u30a4\u30f3\u30c7\u30f3\u30c8\u304c\u304d\u308c\u3044\u306b\u306a\u308b (let (a b) (if (= 1 1) (progn (setq a 2) (setq b 3)) (setq a 10) (setq b 20)) (list a b)) ; => (2 3) (let (a b) (cond ((= \u2026","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%2F20120409%2F1333914073\" title=\"if progn &lt; cond - 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>","author_name":"shigemk2","published":"2012-04-09 04:41:13","title":"if progn < cond","blog_url":"https://www.shigemk2.com/","version":"1.0"}