{"type":"rich","version":"1.0","blog_title":"by shigemk2","published":"2012-04-19 11:54:45","description":"\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u30de\u30af\u30ed\u3092\u4f7f\u3063\u3066\u66f8\u304f\u3053\u3068\u306b\u3059\u308b\u3002 (if t (progn (setq a 1) (message \"%s\" a))) ; => \"1\" (if nil (progn (setq a 1) (message \"%s\" a))) ; => nil \u30de\u30af\u30ed\u3092\u5b9a\u7fa9\u3059\u308b\u306b\u306fdefmacro\u3092\u4f7f\u3046 (defmacro my-when (condition &rest body) `(if ,condition (progn ,@body))) ;; \u30c6\u30b9\u30c8 (my-when t 1 2) ; => 2 (my-when t 1) ; => 1 (my-when nil 1 2) ; => n\u2026","categories":["Emacs Lisp"],"url":"https://www.shigemk2.com/entry/20120419/1334804085","author_name":"shigemk2","height":"190","author_url":"https://blog.hatena.ne.jp/shigemk2/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fwww.shigemk2.com%2Fentry%2F20120419%2F1334804085\" title=\"\u30de\u30af\u30ed\u3092\u5b9a\u7fa9\u3059\u308b - 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>","width":"100%","title":"\u30de\u30af\u30ed\u3092\u5b9a\u7fa9\u3059\u308b","provider_url":"https://hatena.blog","blog_url":"https://www.shigemk2.com/","provider_name":"Hatena Blog","image_url":"http://ecx.images-amazon.com/images/I/51Wg39T8KAL.jpg"}