{"width":"100%","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fwww.shigemk2.com%2Fentry%2F20120409%2F1333970377\" title=\"\u7701\u7565\u53ef\u80fd\u306a\u5f15\u6570\u3092\u5229\u7528\u3057\u305f\u95a2\u6570\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>","published":"2012-04-09 20:19:37","categories":["Emacs Lisp"],"provider_name":"Hatena Blog","url":"https://www.shigemk2.com/entry/20120409/1333970377","image_url":"http://ecx.images-amazon.com/images/I/51Wg39T8KAL.jpg","author_name":"shigemk2","title":"\u7701\u7565\u53ef\u80fd\u306a\u5f15\u6570\u3092\u5229\u7528\u3057\u305f\u95a2\u6570\u3092\u5b9a\u7fa9\u3059\u308b","description":";; a\u306f\u5fc5\u9808\u5f15\u6570\u3067\u3001b\u3068c\u306f\u7701\u7565\u53ef\u80fd\u95a2\u6570(&optional\u3092\u3064\u3051\u308b) (defun optional-arg (a &optional b c) (setq c (or c 20)) ; \u30c7\u30d5\u30a9\u30eb\u30c8\u5f15\u6570\u3082\u3069\u304d (list a b c)) (optional-arg 1) ; => (1 nil 20) (optional-arg 1 2) ; => (1 2 20) (optional-arg 1 2 3) ; => (1 2 3) (optional-arg 1 2 3 4) ; => \u30a8\u30e9\u30fc (setq \u5909\u6570 (or \u5909\u6570 \u5024)) \u8fd4\u308a\u5024: \u5909\u6570\u306e\u5024Emacs Lisp\u30c6\u30af\u30cb\u30c3\u30af\u30d0\u30a4\u30d6\u2026","blog_title":"by shigemk2","provider_url":"https://hatena.blog","type":"rich","author_url":"https://blog.hatena.ne.jp/shigemk2/","height":"190","blog_url":"https://www.shigemk2.com/","version":"1.0"}