{"version":"1.0","height":"190","title":"Crystal \u306f String#to_i \u304c\u30a8\u30e9\u30fc\u306b\u306a\u308b\u3053\u3068\u304c\u3042\u3063\u3066\u3064\u3089\u3044","published":"2015-12-15 00:00:00","blog_url":"https://blog.tmtms.net/","width":"100%","provider_url":"https://hatena.blog","categories":["Crystal","Ruby"],"image_url":null,"blog_title":"tmtms \u306e\u30e1\u30e2","provider_name":"Hatena Blog","author_name":"tmtms","type":"rich","url":"https://blog.tmtms.net/entry/2015/12/15/crystal","description":"\u3053\u308c\u306f\u300cRuby\u8133\u306b\u306fCrystal\u3064\u3089\u3044 Advent Calendar 2015\u300d\u306e15\u65e5\u76ee\u306e\u8a18\u4e8b\u3067\u3059\u3002 qiita.com Ruby \u306e String#to_i \u306f\u6570\u5b57\u4ee5\u5916\u306e\u6587\u5b57\u5217\u306e\u5834\u5408\u306b 0 \u3092\u8fd4\u3057\u307e\u3059\u3002C \u306e atoi() \u3068\u540c\u3058\u3067\u3059\u3002 % ruby -e 'p \"abc\".to_i' 0 Crystal \u306e String#to_i \u306f\u6570\u5b57\u4ee5\u5916\u306e\u6587\u5b57\u5217\u306e\u5834\u5408\u306b\u30a8\u30e9\u30fc\u306b\u306a\u308a\u307e\u3059\u3002 % crystal eval 'p \"abc\".to_i' invalid Int32: abc (ArgumentError) [4367687] *CallStack::unwind:Array(Poin\u2026","author_url":"https://blog.hatena.ne.jp/tmtms/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.tmtms.net%2Fentry%2F2015%2F12%2F15%2Fcrystal\" title=\"Crystal \u306f String#to_i \u304c\u30a8\u30e9\u30fc\u306b\u306a\u308b\u3053\u3068\u304c\u3042\u3063\u3066\u3064\u3089\u3044 - tmtms \u306e\u30e1\u30e2\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>"}