\n\u300c\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u53c2\u7167<\/strong>\u300d\u3068\u3044\u3046\u5358\u5143\u306e\u8aac\u660e\u3082\u3042\u3063\u305f\u3051\u308c\u3069\u3001\u3053\u306e\u7d50\u679c\u3092\u898b\u305f\u65b9\u304c\u5206\u304b\u308a\u3084\u3059\u3044\u6c17\u304c\u3059\u30fc\u3002\u305f\u3060\u3001\u3053\u308c\u3092\u898b\u308b\u3068\u201d\u306e\u3088\u3046\u306a\u3082\u306e<\/strong>\u201d\u3068\u3044\u3046\u304b\u3001\u201d\u3053\u308c\u306f\u30dd\u30a4\u30f3\u30bf\u3060<\/strong>\u201d\u3068\u601d\u3063\u3061\u307e\u3044\u307e\u3059\u3002
\n\u30dd\u30a4\u30f3\u30bf\u306e\u3053\u3068\u3092\u3069\u308c\u3060\u3051\u7406\u89e3\u3057\u3066\u3044\u308b\u306e\u304b\u306f\u7f6e\u3044\u3068\u3044\u3066\u306d\u3002<\/p>\n
irb(main):001:0> a\u00a0 = "Ruby"\r\n=> "Ruby"\r\nirb(main):002:0> b = c = "Ruby"\r\n=> "Ruby"\r\nirb(main):003:0> a.equal?(b)\r\n=> false\r\nirb(main):004:0> b.equal?(c)\r\n=> true\r\nirb(main):008:0> a == b\r\n=> true<\/pre>\n<\/p>\n
\u30fb0.0\/0.0 \u306f\u6570\u5b57\u3067\u306f\u306a\u3044\u3051\u308c\u3069<\/h2>\n
\u6570\u5b57\u3068\u307f\u306a\u3059\u3068 0 \u3060\u306e\u306a<\/strong>\u3002<\/p>\n
irb(main):003:0> num = 0.0\/0.0\r\n=> NaN\r\nirb(main):004:0> num\r\n=> NaN\r\nirb(main):006:0> a.to_i\r\n=> 0\r\nirb(main):010:0> a.to_f\r\n=> 0.0<\/pre>\n<\/p>\n
\u30fb\u4f8b\u5916\u51e6\u7406\u304c\u521d\u898b\u3067\u306f\u5206\u304b\u308a\u306b\u304f\u3044\u305c<\/h2>\n
\u305d\u306e\u307e\u3093\u307e\u3002<\/p>\n
#!\/home\/takeken\/.rbenv\/shims\/ruby\r\n\r\nbegin\r\n\u00a0 file = File.open('hoge.txt')\r\nrescue\r\n\u00a0 puts 'File\u304c\u307f\u3064\u304b\u308a\u307e\u305b\u306c'\r\nensure\r\n\u00a0 file.close if file\r\nend<\/pre>\n<\/p>\n
\u30fb\u4f8b\u5916\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3042\u308c\u3053\u308c<\/h2>\n
\u304a\u624b\u8efd\u3060\u3002\u4eca\u306e\u3068\u3053\u308d\u4f8b\u5916\u3092\u6d3b\u304b\u3057\u305f\u3082\u306e\u304c\u66f8\u3051\u3066\u3044\u306a\u3044\u306e\u3067\u4f7f\u308f\u306a\u3044\u3068\u3060\u3002<\/p>\n
\r\ne.class\r\n[takeken@localhost]$ .\/hoge.rb\r\nError occurred (Errno::ENOENT)\r\ne.message\r\n[takeken@localhost]$ .\/hoge.rb\r\nError occurred (No such file or directory @ rb_sysopen - hoge.txt)\r\ne.backtrace\r\n[takeken@localhost]$ .\/hoge.rb\r\nError occurred ([".\/hoge.rb:4:in `initialize'", ".\/hoge.rb:4:in `open'", ".\/hoge.rb:4:in `<main>'"])\r\n<\/pre>\n<\/p>\n
\u30fb\u30ec\u30b7\u30fc\u30d0\u30fb\u5f15\u6570\u306a\u3057\u3067\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059\u3068\u304d\u306f\u30ab\u30c3\u30b3\u3092\u7701\u7565\u3067\u304d\u306a\u3044<\/h2>\n
\u305d\u306e\u307e\u307e\u306e\u610f\u5473\u3067\u3059\u3002<\/p>\n
<\/p>\n
\u30fbUbuntu\u3068OSX\u306e\u9055\u3044<\/h2>\n
\u80cc\u666f\u304c\u3042\u3063\u3066\u3082\u30d5\u30a9\u30f3\u30c8\u304c\u898b\u3084\u3059\u3044\u306e\u306f\u6d41\u77f3\u3067\u3001\u8a2d\u5b9a\u3057\u3060\u3044\u3067\u306f\u4e21\u8005\u3068\u3082\u304b\u306a\u308a\u8fd1\u3065\u304f\u3068\u601d\u3046\u3051\u308c\u3069\u3001\u3084\u3063\u3071\u308a\u500b\u6027\u304c\u3042\u308b\u306e\u3067\u9055\u3044\u3092\u611f\u3058\u308b\u306a\u3041\u3002\u4eca\u306f\u3084\u3063\u3071OSX\u304c\u30a4\u30a4m9(^^)<\/p>\n
Ubuntu<\/p>\n
![\"nagatos1\"](\"http:\/\/www.vincentina.net\/wp-content\/uploads\/2015\/01\/nagatos1.png\")
<\/a><\/p>\n