{"blog_url":"https://www.shigemk2.com/","url":"https://www.shigemk2.com/entry/20120420/1334894860","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fwww.shigemk2.com%2Fentry%2F20120420%2F1334894860\" title=\"\u6c4e\u5909\u6570 - 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>","description":"setq\u3067\u306f\u4ee3\u5165\u5024\u5de6\u8fba(\u30ea\u30b9\u30c8\u306ecar)\u306e\u66f8\u304d\u63db\u3048\u306f\u51fa\u6765\u306a\u3044\u304c\u3001 \u3053\u306e\u6c4e\u5909\u6570\u3092\u66f8\u304d\u63db\u3048\u308b\u306b\u306fsetq\u3067\u306f\u306a\u304fsetf\u3092\u4f7f\u3046\u3002 ;; \u30ea\u30b9\u30c8\u306e\u5024\u306e\u5909\u66f4 (setq l '(1 2 3)) ;; \u540c\u3058\u3053\u3068\u3092setq\u3067\u3057\u3066\u3082\u30a8\u30e9\u30fc (ignore-errors (setq (car l) 10)) l ; => (1 2 3) (setf (car l) 10) l ; => (10 2 3) ;; macroexpand\u3067\u30de\u30af\u30ed\u306e\u5c55\u958b\u7d50\u679c\u3092\u898b\u308b (macroexpand '(setf (car l) 10)) ; => (setcar l 10) (setf (nth 2 l) 30) ; => \u2026","provider_url":"https://hatena.blog","width":"100%","provider_name":"Hatena Blog","type":"rich","published":"2012-04-20 13:07:40","version":"1.0","categories":["Emacs Lisp"],"image_url":"http://ecx.images-amazon.com/images/I/51Wg39T8KAL.jpg","height":"190","author_url":"https://blog.hatena.ne.jp/shigemk2/","author_name":"shigemk2","title":"\u6c4e\u5909\u6570","blog_title":"by shigemk2"}