{"image_url":null,"provider_name":"Hatena Blog","version":"1.0","title":"\n\t\t\t\tPerl\u306eundef\t\t","published":"2009-10-14 11:33:08","blog_url":"https://blog.tnnsst35.me/","provider_url":"https://hatena.blog","description":"<div class=\"section\"> Perl\u3067\u306f\u3001\u672a\u5b9a\u7fa9\u306a\u5024\u3092undef\u3068\u3057\u3066\u53d6\u308a\u6271\u3046\u3002 $hoge; #$hoge = undef; \u3068\u540c\u3058 \u3053\u3053\u3067$hoge\u3092\u6570\u5024\u578b\u3068\u3057\u3066\u6271\u3046\u5834\u5408\u306f0\u3068\u3057\u3066\u3001 \u6587\u5b57\u5217\u578b\u3068\u3057\u3066\u6271\u3046\u5834\u5408\u306f\u7a7a\u6587\u5b57\u5217\u3068\u3057\u3066\u6271\u3046\u3002 \u307e\u305f\u3001NULL\u5024\u3082undef\u3068\u3057\u3066\u6271\u308f\u308c\u308b\u3088\u3046\u3060\u3002 $hoge += 3; #$hoge = 0 + 3; \u3068\u540c\u3058 $hoge .= \"This is Perl\"; #$hoge = \"\" . \"This is Perl\"; \u3068\u540c\u3058 undef\u5024\u3092\u51fa\u529b\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u30a8\u30e9\u30fc\u306b\u306a\u3063\u3066\u3057\u307e\u3046\u3002 $hoge; print $hoge; #\u30a8\u30e9\u30fc #Use \u2026","url":"https://blog.tnnsst35.me/entry/tech/perl/418/","type":"rich","author_name":"tnnsst35","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.tnnsst35.me%2Fentry%2Ftech%2Fperl%2F418%2F\" title=\"\n\t\t\t\tPerl\u306eundef\t\t - \u307c\u304f\u306e\u30bb\u30fc\u30d6\u30dd\u30a4\u30f3\u30c8\" 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%","categories":["Perl"],"blog_title":"\u307c\u304f\u306e\u30bb\u30fc\u30d6\u30dd\u30a4\u30f3\u30c8","height":"190","author_url":"https://blog.hatena.ne.jp/tnnsst35/"}