{"categories":["\u6280\u8853"],"author_url":"https://blog.hatena.ne.jp/hiratara/","type":"rich","description":"\u30e9\u30af\u30c0\u672c\u306b\u3088\u308b\u3068\u3001%hoge\u306b\u5024\u304c\u3042\u308b\u304b\u306e\u5224\u5b9a\u306f\u3001 do_something() if defined %hoge; \u3067\u306f\u306a\u304f\u3001 do_something() if %hoge; \u304c\u3044\u3044\u3063\u307d\u3044\u3067\u3059\u3002\u304a\u8a66\u3057\u30b3\u30fc\u30c9\u3002 use strict; my %hoge = (); print \"before\\n\"; printf(\"disp : %s\\n\", scalar(%hoge)); printf(\"defined?: %s\\n\", defined %hoge ? 'True' : 'False'); printf(\"true? : %s\\n\", %hoge ? 'True' : 'False'); \u2026","blog_url":"https://hiratara.hatenadiary.jp/","author_name":"hiratara","published":"2007-12-06 11:26:20","blog_title":"Pixel Pedals of Tomakomai","width":"100%","title":"\u30cf\u30c3\u30b7\u30e5\u306e\u5224\u5b9a\u306f\u88f8\u3067","version":"1.0","provider_url":"https://hatena.blog","height":"190","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fhiratara.hatenadiary.jp%2Fentry%2F20071206%2F1196907980\" title=\"\u30cf\u30c3\u30b7\u30e5\u306e\u5224\u5b9a\u306f\u88f8\u3067 - Pixel Pedals of Tomakomai\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","provider_name":"Hatena Blog","url":"https://hiratara.hatenadiary.jp/entry/20071206/1196907980","image_url":null}