{"id":40,"date":"2022-12-18T19:57:10","date_gmt":"2023-05-24T02:04:13","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/index.php\/2023\/11\/30\/ruby%e3%81%a7%e3%81%ae%e9%85%8d%e5%88%97%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89%e3%81%ae%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95\/"},"modified":"2025-07-31T13:36:03","modified_gmt":"2025-07-31T04:36:03","slug":"ruby%e3%81%a7%e3%81%ae%e9%85%8d%e5%88%97%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89%e3%81%ae%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/ruby%e3%81%a7%e3%81%ae%e9%85%8d%e5%88%97%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89%e3%81%ae%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95\/","title":{"rendered":"Ruby\u3067\u306e\u914d\u5217\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9"},"content":{"rendered":"

\u30a4\u30f3\u30c8\u30ed\u30c0\u30af\u30b7\u30e7\u30f3<\/h3>\n

\u914d\u5217\u306f\u30d7\u30ed\u30b0\u30e9\u30e0\u5185\u3067\u30c7\u30fc\u30bf\u306e\u30ea\u30b9\u30c8\u3092\u8868\u73fe\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u914d\u5217\u306b\u30c7\u30fc\u30bf\u304c\u3042\u308b\u5834\u5408\u3001\u30bd\u30fc\u30c8\u3057\u305f\u308a\u3001\u91cd\u8907\u3092\u524a\u9664\u3057\u305f\u308a\u3001\u9806\u5e8f\u3092\u9006\u306b\u3057\u305f\u308a\u3001\u914d\u5217\u306e\u4e00\u90e8\u3092\u62bd\u51fa\u3057\u305f\u308a\u3001\u7279\u5b9a\u306e\u30c7\u30fc\u30bf\u3092\u691c\u7d22\u3057\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001\u914d\u5217\u3092\u6587\u5b57\u5217\u306b\u5909\u63db\u3057\u305f\u308a\u3001\u30c7\u30fc\u30bf\u306e\u914d\u5217\u3092\u5225\u306e\u914d\u5217\u306b\u5909\u63db\u3057\u305f\u308a\u3001\u914d\u5217\u3092\uff11\u3064\u306e\u5024\u306b\u307e\u3068\u3081\u305f\u308a\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u3053\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3067\u306f\u3001\u914d\u5217\u306b\u683c\u7d0d\u3055\u308c\u305f\u30c7\u30fc\u30bf\u3092\u6271\u3046\u305f\u3081\u306bRuby\u304c\u63d0\u4f9b\u3059\u308b\u6700\u3082\u5b9f\u7528\u7684\u306a\u65b9\u6cd5\u3092\u63a2\u7d22\u3057\u307e\u3059\u3002<\/p>\n

\u3053\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3092\u9032\u3081\u308b\u3068\u3001\u300c!\u300d\u3067\u7d42\u308f\u308b\u30e1\u30bd\u30c3\u30c9\u304c\u3044\u304f\u3064\u304b\u51fa\u3066\u304d\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30e1\u30bd\u30c3\u30c9\u306b\u306f\u3001\u5143\u306e\u5024\u3092\u5909\u66f4\u3057\u305f\u308a\u4f8b\u5916\u3092\u767a\u751f\u3055\u305b\u305f\u308a\u3059\u308b\u306a\u3069\u306e\u526f\u4f5c\u7528\u304c\u3088\u304f\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3067\u4f7f\u7528\u3059\u308b\u591a\u304f\u306e\u30e1\u30bd\u30c3\u30c9\u306b\u306f\u3001\u3053\u306e\u63a5\u5c3e\u8f9e\u3092\u6301\u3063\u305f\u95a2\u9023\u30e1\u30bd\u30c3\u30c9\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u307e\u305f\u3001\u7591\u554f\u7b26\uff08?\uff09\u3067\u7d42\u308f\u308b\u30e1\u30bd\u30c3\u30c9\u306b\u3082\u51fa\u4f1a\u3046\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u771f\u507d\u5024\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n

\u3053\u308c\u3089\u306fRuby\u5168\u4f53\u3067\u4f7f\u7528\u3055\u308c\u308b\u547d\u540d\u898f\u5247\u3067\u3059\u3002\u30d7\u30ed\u30b0\u30e9\u30e0\u30ec\u30d9\u30eb\u3067\u5f37\u5236\u3055\u308c\u308b\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u305f\u3060\u3001\u30e1\u30bd\u30c3\u30c9\u304b\u3089\u671f\u5f85\u3067\u304d\u308b\u3082\u306e\u3092\u7279\u5b9a\u3059\u308b\u5225\u306e\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n

\u914d\u5217\u30e1\u30bd\u30c3\u30c9\u306e\u63a2\u7d22\u3092\u59cb\u3081\u308b\u524d\u306b\u3001\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3044\u304f\u3064\u304b\u306e\u65b9\u6cd5\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n

\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9<\/h2>\n

Ruby\u3067\u306e\u914d\u5217\u306e\u64cd\u4f5c\u306b\u3064\u3044\u3066\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3092\u3059\u3067\u306b\u30d5\u30a9\u30ed\u30fc\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f7f\u7528\u3057\u3066\u500b\u5225\u306e\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u3053\u3068\u3092\u77e5\u3063\u3066\u3044\u307e\u3059\u3002\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f0\u304b\u3089\u59cb\u307e\u308a\u307e\u3059\u306e\u3067\u3001\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

sharks =<\/span> [<\/span>\"Tiger\"<\/span><\/span>,<\/span> \"Great White\"<\/span><\/span>,<\/span> \"Hammerhead\"<\/span><\/span>,<\/span> \"Angel\"<\/span><\/span>]<\/span>\r\nsharks[<\/span>0<\/span>]<\/span> # \"Tiger\"<\/span>\r\nsharks[<\/span>1<\/span>]<\/span> # \"Great White\"<\/span>\r\nsharks[<\/span>-<\/span>1<\/span>]<\/span> # \"Angel\"<\/span>\r\n<\/code><\/pre>\n
\u3042\u306a\u305f\u3082\u601d\u3044\u51fa\u3059\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u6700\u521d\u3068\u6700\u5f8c\u306e\u8981\u7d20\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306b\u6700\u521d\u3068\u6700\u5f8c\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n
sharks =<\/span> [<\/span>\"Tiger\"<\/span><\/span>,<\/span> \"Great White\"<\/span><\/span>,<\/span> \"Hammerhead\"<\/span><\/span>,<\/span> \"Angel\"<\/span><\/span>]<\/span>\r\nsharks.<\/span>first # \"Tiger\"<\/span>\r\nsharks.<\/span>last # \"Angel\"<\/span>\r\n<\/code><\/pre>\n
\u6700\u5f8c\u306b\u3001\u5b58\u5728\u3057\u306a\u3044\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3068\u3001nil\u304c\u8fd4\u3055\u308c\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u30a8\u30e9\u30fc\u3092\u53d6\u5f97\u3057\u305f\u3044\u5834\u5408\u306f\u3001fetch\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
sharks.<\/span>fetch(<\/span>42<\/span>)<\/span>\r\n<\/code><\/pre>\n
<\/code><\/pre>\n
Output<\/div>\n
<\/code><\/pre>\n
IndexError: index 42 outside of array bounds: -4…4<\/p>\n
<\/code><\/pre>\n
\u30a8\u30e9\u30fc\u3092\u767a\u751f\u3055\u305b\u308b\u4ee3\u308f\u308a\u306b\u3001\u72ec\u81ea\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n
sharks.<\/span>fetch(<\/span>42<\/span>,<\/span> \"Nope\"<\/span><\/span>)<\/span> # \"Nope\"<\/span>\r\n<\/code><\/pre>\n
\u3067\u306f\u3001\u914d\u5217\u304b\u3089\u8907\u6570\u306e\u8981\u7d20\u3092\u53d6\u5f97\u3059\u308b\u65b9\u6cd5\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
\u8907\u6570\u306e\u8981\u7d20\u306e\u53d6\u5f97<\/h2>\n
\u5358\u4e00\u306e\u8981\u7d20\u3067\u306f\u306a\u304f\u3001\u914d\u5217\u304b\u3089\u5024\u306e\u30b5\u30d6\u30bb\u30c3\u30c8\u3092\u53d6\u5f97\u3057\u305f\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
\u3082\u3057\u3001\u59cb\u70b9\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u6307\u5b9a\u3057\u3001\u305d\u306e\u5f8c\u306b\u8981\u7d20\u306e\u6570\u3092\u6307\u5b9a\u3059\u308c\u3070\u3001\u305d\u308c\u3089\u306e\u5024\u3092\u542b\u3093\u3060\u65b0\u3057\u3044\u914d\u5217\u3092\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3057\u3066sharks\u914d\u5217\u304b\u3089\u4e2d\u9593\u306e2\u3064\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
sharks =<\/span> [<\/span>\"Tiger\"<\/span><\/span>,<\/span> \"Great White\"<\/span><\/span>,<\/span> \"Hammerhead\"<\/span><\/span>,<\/span> \"Angel\"<\/span><\/span>]<\/span>\r\nsharks[<\/span>1<\/span>,<\/span>2<\/span>]<\/span> # [\"Great White\", \"Hammerhead\"]<\/span>\r\n<\/code><\/pre>\n
\uff11\u756a\u76ee\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u300c\u30b0\u30ec\u30fc\u30c8\u30db\u30ef\u30a4\u30c8\u300d\u3068\u3057\u3066\u30b9\u30bf\u30fc\u30c8\u3057\u3001\uff12\u3064\u306e\u8981\u7d20\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u65b0\u3057\u3044\u914d\u5217\u306b\u306f\u300c\u30b0\u30ec\u30fc\u30c8\u30db\u30ef\u30a4\u30c8\u300d\u3068\u300c\u30cf\u30f3\u30de\u30fc\u30d8\u30c3\u30c9\u300d\u304c\u542b\u307e\u308c\u307e\u3059\u3002<\/p>\n
\u540c\u3058\u3053\u3068\u3092\u3059\u308b\u305f\u3081\u306b\u3001\u30b9\u30e9\u30a4\u30b9\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
sharks =<\/span> [<\/span>\"Tiger\"<\/span><\/span>,<\/span> \"Great White\"<\/span><\/span>,<\/span> \"Hammerhead\"<\/span><\/span>,<\/span> \"Angel\"<\/span><\/span>]<\/span>\r\nsharks.<\/span>slice(<\/span>1<\/span>,<\/span>2<\/span>)<\/span> # [\"Great White\", \"Hammerhead\"]<\/span>\r\n<\/code><\/pre>\n
\u30b9\u30e9\u30a4\u30b9\u30e1\u30bd\u30c3\u30c9\u306f\u65b0\u3057\u3044\u914d\u5217\u3092\u8fd4\u3057\u3001\u5143\u306e\u914d\u5217\u306f\u5909\u66f4\u3055\u308c\u307e\u305b\u3093\u3002\u305f\u3060\u3057\u3001\u30b9\u30e9\u30a4\u30b9\uff01\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u5143\u306e\u914d\u5217\u3082\u5909\u66f4\u3055\u308c\u307e\u3059\u3002<\/p>\n
take\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u914d\u5217\u306e\u5148\u982d\u304b\u3089\u6307\u5b9a\u3057\u305f\u6570\u306e\u30a8\u30f3\u30c8\u30ea\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
sharks =<\/span> [<\/span>\"Tiger\"<\/span><\/span>,<\/span> \"Great White\"<\/span><\/span>,<\/span> \"Hammerhead\"<\/span><\/span>,<\/span> \"Angel\"<\/span><\/span>]<\/span>\r\nsharks.<\/span>take(<\/span>2<\/span>)<\/span> # [\"Tiger\", \"Great White\"]<\/span>\r\n<\/code><\/pre>\n
\u6642\u3005\u3001\u7279\u5b9a\u306e\u5024\u3067\u306f\u306a\u304f\u3001\u914d\u5217\u304b\u3089\u30e9\u30f3\u30c0\u30e0\u306a\u5024\u3092\u53d6\u5f97\u3057\u305f\u3044\u3068\u601d\u3046\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u308c\u306b\u3064\u3044\u3066\u63a2\u3063\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
\u914d\u5217\u304b\u3089\u30e9\u30f3\u30c0\u30e0\u306a\u30a8\u30f3\u30c8\u30ea\u30fc\u3092\u53d6\u5f97\u3059\u308b\u3002 (Ry\u014dretsu kara randamuna entor\u012b o shutoku suru)<\/h2>\n
\u30b2\u30fc\u30e0\u306e\u958b\u767a\u3092\u3057\u3066\u3044\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3057\u3001\u30b3\u30f3\u30c6\u30b9\u30c8\u306e\u52dd\u8005\u3092\u9078\u3076\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u4f5c\u6210\u3057\u3066\u3044\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002\u305d\u306e\u3088\u3046\u306a\u5834\u5408\u306b\u306f\u3001\u30e9\u30f3\u30c0\u30e0\u306a\u5024\u304c\u5fc5\u8981\u3067\u3059\u3002\u4e00\u822c\u7684\u306a\u89e3\u6c7a\u7b56\u3068\u3057\u3066\u3001\u53ef\u80fd\u306a\u9078\u629e\u80a2\u3092\u914d\u5217\u306b\u683c\u7d0d\u3057\u3001\u30e9\u30f3\u30c0\u30e0\u306a\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u9078\u629e\u3059\u308b\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
\u914d\u5217\u304b\u3089\u30e9\u30f3\u30c0\u30e0\u306a\u8981\u7d20\u3092\u53d6\u5f97\u3059\u308b\u306b\u306f\u3001\u914d\u5217\u306e\u6700\u521d\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304b\u3089\u6700\u5f8c\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u307e\u3067\u306e\u7bc4\u56f2\u3067\u30e9\u30f3\u30c0\u30e0\u306a\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u751f\u6210\u3057\u3001\u305d\u306e\u5024\u3092\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3068\u3057\u3066\u4f7f\u7528\u3057\u3066\u5024\u3092\u53d6\u5f97\u3059\u308b\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u3088\u308a\u7c21\u5358\u306a\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\uff1asample\u30e1\u30bd\u30c3\u30c9\u306f\u914d\u5217\u304b\u3089\u30e9\u30f3\u30c0\u30e0\u306a\u30a8\u30f3\u30c8\u30ea\u30fc\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n
\u30e9\u30f3\u30c0\u30e0\u306b\u9078\u3070\u308c\u305f\u30b9\u30c8\u30c3\u30af\u56de\u7b54\u306e\u914d\u5217\u304b\u3089\u3001\u30de\u30b8\u30c3\u30af8\u30dc\u30fc\u30eb\u30b2\u30fc\u30e0\u306e\u521d\u6b69\u7684\u306a\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u4f5c\u308b\u305f\u3081\u306b\u305d\u308c\u3092\u4f7f\u3044\u307e\u3057\u3087\u3046\u3002<\/p>\n
\n
\uff18\u30dc\u30fc\u30eb.rb\u3092\u65e5\u672c\u8a9e\u306b\u81ea\u7136\u306a\u5f62\u3067\u8a00\u3044\u63db\u3048\u3066\u304f\u3060\u3055\u3044\u3002\u305f\u3060\u3057\u3001\u4e00\u3064\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3060\u3051\u3067\u5341\u5206\u3067\u3059\u3002<\/p>\n
\u30dc\u30fc\u30ea\u30f3\u30b08.rb<\/p>\n<\/div>\n
answers =<\/span> [<\/span>\"Yes\"<\/span><\/span>,<\/span> \"No\"<\/span><\/span>,<\/span> \"Maybe\"<\/span><\/span>,<\/span> \"Ask again later\"<\/span><\/span>]<\/span>\r\nprint answers.<\/span>sample\r\n<\/code><\/pre>\n
<\/code><\/pre>\n
Output<\/div>\n
<\/code><\/pre>\n
Maybe<\/p>\n
<\/code><\/pre>\n
\u30b5\u30f3\u30d7\u30eb\u30e1\u30bd\u30c3\u30c9\u306f\u5f15\u6570\u3082\u53d7\u3051\u5165\u308c\u307e\u3059\u304c\u3001\u305d\u308c\u306f\u30e9\u30f3\u30c0\u30e0\u306a\u30a8\u30f3\u30c8\u30ea\u306e\u914d\u5217\u3092\u8fd4\u3057\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u8907\u6570\u306e\u30e9\u30f3\u30c0\u30e0\u306a\u30a8\u30f3\u30c8\u30ea\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f\u3001\u5e0c\u671b\u3059\u308b\u6570\u3092\u6307\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
\u30e9\u30f3\u30c0\u30e0\u306a\u30b5\u30e1.rb<\/div>\n
sharks =<\/span> [<\/span>\"Hammerhead\"<\/span><\/span>,<\/span> \"Great White\"<\/span><\/span>,<\/span> \"Tiger\"<\/span><\/span>,<\/span> \"Whale\"<\/span><\/span>]<\/span>\r\nsample =<\/span> sharks.<\/span>sample(<\/span>2<\/span>)<\/span>\r\nprint sample\r\n<\/code><\/pre>\n
<\/code><\/pre>\n
Output<\/div>\n
<\/code><\/pre>\n
[“Whale”, “Great White”]<\/p>\n
<\/code><\/pre>\n
\u6b21\u306b\u3001\u914d\u5217\u5185\u306e\u7279\u5b9a\u306e\u8981\u7d20\u3092\u63a2\u3057\u65b9\u306b\u3064\u3044\u3066\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
\u8981\u7d20\u306e\u691c\u7d22\u3068\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u306e\u63a2\u3057\u65b9<\/h2>\n
\u914d\u5217\u5185\u306e\u7279\u5b9a\u306e\u8981\u7d20\u3092\u63a2\u3057\u3066\u3044\u308b\u6642\u306f\u3001\u901a\u5e38\u3001\u8a72\u5f53\u3059\u308b\u8981\u7d20\u304c\u898b\u3064\u304b\u308b\u307e\u3067\u914d\u5217\u306e\u8981\u7d20\u3092\u7e70\u308a\u8fd4\u3057\u51e6\u7406\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u3057\u304b\u3057\u3001Ruby\u306e\u914d\u5217\u306b\u306f\u3001\u914d\u5217\u5185\u3092\u691c\u7d22\u3059\u308b\u30d7\u30ed\u30bb\u30b9\u3092\u7c21\u7565\u5316\u3059\u308b\u305f\u3081\u306b\u7279\u306b\u8a2d\u8a08\u3055\u308c\u305f\u3044\u304f\u3064\u304b\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u8981\u7d20\u304c\u5b58\u5728\u3059\u308b\u304b\u3069\u3046\u304b\u3060\u3051\u3092\u78ba\u8a8d\u3057\u305f\u3044\u5834\u5408\u306f\u3001include?\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u6307\u5b9a\u3055\u308c\u305f\u30c7\u30fc\u30bf\u304c\u914d\u5217\u306e\u8981\u7d20\u3067\u3042\u308c\u3070true\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n
sharks =<\/span> [<\/span>\"Hammerhead\"<\/span><\/span>,<\/span> \"Great White\"<\/span><\/span>,<\/span> \"Tiger\"<\/span><\/span>,<\/span> \"Whale\"<\/span><\/span>]<\/span>\r\nsharks.<\/span>include<\/span>?<\/span> \"Tiger\"<\/span><\/span> # true<\/span>\r\n\r\n[<\/span>\"a\"<\/span><\/span>,<\/span> \"b\"<\/span><\/span>,<\/span> \"c\"<\/span><\/span>]<\/span>.<\/span>include<\/span>?<\/span> 2<\/span> # false<\/span>\r\n<\/code><\/pre>\n
\u305f\u3060\u3057\u3001include?\u306f\u5b8c\u5168\u4e00\u81f4\u3092\u5fc5\u8981\u3068\u3059\u308b\u305f\u3081\u3001\u90e8\u5206\u7684\u306a\u5358\u8a9e\u3092\u63a2\u3059\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n
sharks =<\/span> [<\/span>\"Hammerhead\"<\/span><\/span>,<\/span> \"Great White\"<\/span><\/span>,<\/span> \"Tiger\"<\/span><\/span>,<\/span> \"Whale\"<\/span><\/span>]<\/span>\r\nsharks.<\/span>include<\/span>?<\/span> \"Tiger\"<\/span><\/span> # true<\/span>\r\nsharks.<\/span>include<\/span>?<\/span> \"tiger\"<\/span><\/span> # false<\/span>\r\nsharks.<\/span>include<\/span>?<\/span> \"ti\"<\/span><\/span> # false<\/span>\r\n<\/code><\/pre>\n
\u6307\u5b9a\u3057\u305f\u6761\u4ef6\u306b\u4e00\u81f4\u3059\u308b\u3001\u914d\u5217\u5185\u306e\u6700\u521d\u306e\u8981\u7d20\u3092\u898b\u3064\u3051\u3066\u8fd4\u3059find\u30e1\u30bd\u30c3\u30c9\u3002<\/p>\n
\u4f8b\u3048\u3070\u3001\u6587\u5b57”a”\u3092\u542b\u3080sharks\u914d\u5217\u306e\u6700\u521d\u306e\u30a8\u30f3\u30c8\u30ea\u3092\u7279\u5b9a\u3059\u308b\u306b\u306f\u3001\u5404\u30a8\u30f3\u30c8\u30ea\u3092\u6bd4\u8f03\u3057\u3001\u6700\u521d\u306e\u30a8\u30f3\u30c8\u30ea\u3092\u898b\u3064\u3051\u305f\u6642\u70b9\u3067\u53cd\u5fa9\u51e6\u7406\u3092\u505c\u6b62\u3059\u308b\u3088\u3046\u306b\u3001each\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
sharks =<\/span> [<\/span>\"Hammerhead\"<\/span><\/span>,<\/span> \"Great White\"<\/span><\/span>,<\/span> \"Tiger\"<\/span><\/span>,<\/span> \"Whale\"<\/span><\/span>]<\/span>\r\nresult =<\/span> nil<\/span>\r\nsharks.<\/span>each<\/span> do<\/span> |<\/span>shark|<\/span>\r\nif<\/span> sharks.<\/span>include<\/span>?<\/span> \"a\"<\/span><\/span>\r\nresult =<\/span> shark\r\nbreak<\/span>\r\nend<\/span>\r\nend<\/span>\r\n<\/code><\/pre>\n
\u540c\u3058\u3053\u3068\u3092\u3059\u308b\u305f\u3081\u306b\u3001”find”\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n
sharks =<\/span> [<\/span>\"Hammerhead\"<\/span><\/span>,<\/span> \"Great White\"<\/span><\/span>,<\/span> \"Tiger\"<\/span><\/span>,<\/span> \"Whale\"<\/span><\/span>]<\/span>\r\nresult =<\/span> sharks.<\/span>find {<\/span>|<\/span>item|<\/span> item.<\/span>include<\/span>?<\/span>(<\/span>\"a\"<\/span><\/span>)<\/span>}<\/span>\r\nprint result\r\n<\/code><\/pre>\n
<\/code><\/pre>\n
Output<\/div>\n
<\/code><\/pre>\n
Hammerhead<\/p>\n
<\/code><\/pre>\n
\u4e0e\u3048\u3089\u308c\u305f\u30d6\u30ed\u30c3\u30af\u3092\u914d\u5217\u306e\u5404\u8981\u7d20\u306b\u5bfe\u3057\u3066\u5b9f\u884c\u3059\u308bfind\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002\u30d6\u30ed\u30c3\u30af\u5185\u306e\u6700\u5f8c\u306e\u5f0f\u304ctrue\u3068\u8a55\u4fa1\u3055\u308c\u308b\u5834\u5408\u3001find\u30e1\u30bd\u30c3\u30c9\u306f\u305d\u306e\u5024\u3092\u8fd4\u3057\u3001\u53cd\u5fa9\u3092\u505c\u6b62\u3057\u307e\u3059\u3002\u5168\u3066\u306e\u8981\u7d20\u3092\u53cd\u5fa9\u3057\u305f\u5f8c\u3067\u3082\u4f55\u3082\u898b\u3064\u304b\u3089\u306a\u3044\u5834\u5408\u306f\u3001nil\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n
\u30bb\u30ec\u30af\u30c8\u30e1\u30bd\u30c3\u30c9\u306f\u540c\u69d8\u306e\u65b9\u6cd5\u3067\u6a5f\u80fd\u3057\u307e\u3059\u304c\u3001\u6761\u4ef6\u306b\u4e00\u81f4\u3059\u308b\u8981\u7d20\u3059\u3079\u3066\u3092\u542b\u3080\u65b0\u3057\u3044\u914d\u5217\u3092\u4f5c\u6210\u3057\u3066\u8fd4\u3057\u307e\u3059\u3002\u4e00\u3064\u306e\u5024\u3092\u8fd4\u3059\u3060\u3051\u3067\u306a\u304f\u3001\u51e6\u7406\u3092\u7d42\u4e86\u3059\u308b\u4ee3\u308f\u308a\u306b\u3002<\/p>\n
sharks =<\/span> [<\/span>\"Hammerhead\"<\/span><\/span>,<\/span> \"Great White\"<\/span><\/span>,<\/span> \"Tiger\"<\/span><\/span>,<\/span> \"Whale\"<\/span><\/span>]<\/span>\r\nresults =<\/span> sharks.<\/span>select {<\/span>|<\/span>item|<\/span> item.<\/span>include<\/span>?<\/span>(<\/span>\"a\"<\/span><\/span>)<\/span>}<\/span>\r\nprint results\r\n<\/code><\/pre>\n
<\/code><\/pre>\n
Output<\/div>\n
<\/code><\/pre>\n
[“Hammerhead”, “Great White”, “Whale”]<\/p>\n
<\/code><\/pre>\n
reject\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u6761\u4ef6\u306b\u4e00\u81f4\u3057\u306a\u3044\u8981\u7d20\u3092\u542b\u307e\u306a\u3044\u65b0\u3057\u3044\u914d\u5217\u3092\u8fd4\u3057\u307e\u3059\u3002\u8981\u7d20\u3092\u524a\u9664\u3059\u308b\u30d5\u30a3\u30eb\u30bf\u30fc\u3068\u8003\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001\u6587\u5b57”a”\u3092\u542b\u3080\u3059\u3079\u3066\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u3092\u62d2\u5426\u3059\u308b\u4f8b\u3067\u3059\u3002<\/p>\n
sharks =<\/span> [<\/span>\"Hammerhead\"<\/span><\/span>,<\/span> \"Great White\"<\/span><\/span>,<\/span> \"Tiger\"<\/span><\/span>,<\/span> \"Whale\"<\/span><\/span>]<\/span>\r\nresults =<\/span> sharks.<\/span>reject {<\/span>|<\/span>item|<\/span> item.<\/span>include<\/span>?<\/span>(<\/span>\"a\"<\/span><\/span>)<\/span>}<\/span>\r\nprint results\r\n<\/code><\/pre>\n
<\/code><\/pre>\n
Output<\/div>\n
<\/code><\/pre>\n
[“Tiger”]<\/p>\n
<\/code><\/pre>\n
\u65b0\u3057\u3044\u914d\u5217\u3092\u8fd4\u3059\u306e\u306f\u3001select\u3068reject\u306e\u4e21\u65b9\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u304c\u3001\u30aa\u30ea\u30b8\u30ca\u30eb\u306e\u914d\u5217\u306f\u5909\u66f4\u3055\u308c\u307e\u305b\u3093\u3002\u3057\u304b\u3057\u3001select!\u3068reject!\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30aa\u30ea\u30b8\u30ca\u30eb\u306e\u914d\u5217\u304c\u5909\u66f4\u3055\u308c\u307e\u3059\u3002<\/p>\n
find_all\u30e1\u30bd\u30c3\u30c9\u306fselect\u306e\u5225\u540d\u3067\u3059\u304c\u3001find_all!\u30e1\u30bd\u30c3\u30c9\u306f\u5b58\u5728\u3057\u307e\u305b\u3093\u3002<\/p>\n
\u6b21\u306b\u3001\u914d\u5217\u306e\u5024\u3092\u30bd\u30fc\u30c8\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
\u914d\u5217\u306e\u30bd\u30fc\u30c8<\/h2>\n
\u30c7\u30fc\u30bf\u3092\u6574\u7406\u3059\u308b\u3053\u3068\u306f\u4e00\u822c\u7684\u306a\u65b9\u6cd5\u3067\u3059\u3002\u540d\u524d\u306e\u30ea\u30b9\u30c8\u3092\u30a2\u30eb\u30d5\u30a1\u30d9\u30c3\u30c8\u9806\u306b\u4e26\u3079\u305f\u308a\u3001\u6570\u5b57\u3092\u5c0f\u3055\u3044\u9806\u304b\u3089\u5927\u304d\u3044\u9806\u306b\u4e26\u3079\u66ff\u3048\u308b\u5fc5\u8981\u304c\u3042\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n
Ruby\u306e\u914d\u5217\u306b\u306f\u3001\u8981\u7d20\u306e\u9806\u5e8f\u3092\u9006\u306b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308breverse\u30e1\u30bd\u30c3\u30c9\u304c\u3042\u308a\u307e\u3059\u3002\u65e2\u306b\u6574\u7406\u3055\u308c\u305f\u30c7\u30fc\u30bf\u306e\u30ea\u30b9\u30c8\u304c\u3042\u308b\u5834\u5408\u3001reverse\u306f\u8981\u7d20\u3092\u7c21\u5358\u306b\u53cd\u8ee2\u3055\u305b\u308b\u305f\u3081\u306e\u4fbf\u5229\u306a\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n
sharks =<\/span> [<\/span>\"Angel\"<\/span><\/span>,<\/span> \"Great White\"<\/span><\/span>,<\/span> \"Hammerhead\"<\/span><\/span>,<\/span> \"Tiger\"<\/span><\/span>]<\/span>\r\nreversed_sharks =<\/span> sharks.<\/span>reverse\r\nprint reversed_sharks\r\n<\/code><\/pre>\n
<\/code><\/pre>\n
Output<\/div>\n
<\/code><\/pre>\n
[“Tiger”, “Hammerhead”, “Great White”, “Angel”]<\/p>\n
<\/code><\/pre>\n
\u9006\u30e1\u30bd\u30c3\u30c9\u306f\u65b0\u3057\u3044\u914d\u5217\u3092\u8fd4\u3057\u3001\u5143\u306e\u914d\u5217\u306f\u5909\u66f4\u3057\u307e\u305b\u3093\u3002\u30aa\u30ea\u30b8\u30ca\u30eb\u306e\u914d\u5217\u3092\u5909\u66f4\u3057\u305f\u3044\u5834\u5408\u306f\u3001reverse!\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
\u305f\u3060\u3057\u3001\u914d\u5217\u3092\u9006\u306b\u3059\u308b\u3053\u3068\u306f\u5e38\u306b\u30c7\u30fc\u30bf\u3092\u6574\u7406\u3059\u308b\u6700\u3082\u52b9\u7387\u7684\u3067\u5b9f\u7528\u7684\u306a\u65b9\u6cd5\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u30bd\u30fc\u30c8\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u914d\u5217\u306e\u8981\u7d20\u3092\u597d\u307f\u306e\u65b9\u6cd5\u3067\u6574\u7406\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
\u5358\u7d14\u306a\u6587\u5b57\u5217\u3084\u6570\u5b57\u306e\u914d\u5217\u306b\u304a\u3044\u3066\u306f\u3001\u30bd\u30fc\u30c8\u30e1\u30bd\u30c3\u30c9\u306f\u52b9\u7387\u7684\u3067\u3042\u308a\u3001\u6c42\u3081\u3066\u3044\u308b\u7d50\u679c\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n
sharks =<\/span> [<\/span>\"Tiger\"<\/span><\/span>,<\/span> \"Great White\"<\/span><\/span>,<\/span> \"Hammerhead\"<\/span><\/span>,<\/span> \"Angel\"<\/span><\/span>]<\/span>\r\nsorted_sharks =<\/span> sharks.<\/span>sort\r\nprint sorted_sharks\r\n<\/code><\/pre>\n
<\/code><\/pre>\n
Output<\/div>\n
<\/code><\/pre>\n
[“Angel”, “Great White”, “Hammerhead”, “Tiger”]<\/p>\n
<\/code><\/pre>\n
\u305f\u3060\u3057\u3001\u7570\u306a\u308b\u65b9\u6cd5\u3067\u7269\u4e8b\u3092\u30bd\u30fc\u30c8\u3057\u305f\u3044\u5834\u5408\u306f\u3001\u30bd\u30fc\u30c8\u30e1\u30bd\u30c3\u30c9\u306b\u305d\u306e\u65b9\u6cd5\u3092\u6559\u3048\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u30bd\u30fc\u30c8\u30e1\u30bd\u30c3\u30c9\u306f\u3001Ruby\u30d6\u30ed\u30c3\u30af\u3092\u53d7\u3051\u53d6\u308a\u3001\u305d\u308c\u306b\u3088\u308a\u914d\u5217\u5185\u306e\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3066\u6bd4\u8f03\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u6bd4\u8f03\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u6bd4\u8f03\u6f14\u7b97\u5b50\uff08<=>\uff09\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u3053\u306e\u6f14\u7b97\u5b50\u306f\u30012\u3064\u306eRuby\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6bd4\u8f03\u3057\u3001\u5de6\u5074\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u5c0f\u3055\u3044\u5834\u5408\u306f-1\u3092\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u540c\u3058\u5834\u5408\u306f0\u3092\u3001\u5de6\u5074\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u5927\u304d\u3044\u5834\u5408\u306f1\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n
1<\/span> <=><\/span> 2<\/span> # -1<\/span>\r\n2<\/span> <=><\/span> 2<\/span> # 0<\/span>\r\n2<\/span> <=><\/span> 1<\/span> # 1<\/span>\r\n<\/code><\/pre>\n
Ruby\u306esort\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u914d\u5217\u5185\u306e\u5024\u3092\u30bd\u30fc\u30c8\u3059\u308b\u305f\u3081\u306b-1\u30010\u3001\u307e\u305f\u306f1\u3092\u8fd4\u3059\u5fc5\u8981\u304c\u3042\u308b\u30d6\u30ed\u30c3\u30af\u3092\u53d7\u3051\u4ed8\u3051\u307e\u3059\u3002<\/p>\n
\u3053\u3053\u306b\u306f\u3001\u6607\u9806\u306b\u4e26\u3079\u66ff\u3048\u308b\u914d\u5217\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u3092\u660e\u793a\u7684\u306b\u6bd4\u8f03\u3059\u308b\u4f8b\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
sharks =<\/span> [<\/span>\"Tiger\"<\/span><\/span>,<\/span> \"Great White\"<\/span><\/span>,<\/span> \"Hammerhead\"<\/span><\/span>,<\/span> \"Angel\"<\/span><\/span>]<\/span>\r\nsorted_sharks =<\/span> sharks.<\/span>sort{<\/span>|<\/span>a,<\/span>b|<\/span> a <=><\/span> b }<\/span>\r\nprint sorted_sharks\r\n<\/code><\/pre>\n
\u5909\u6570a\u3068b\u306f\u3001\u6bd4\u8f03\u5bfe\u8c61\u3068\u306a\u308b\u914d\u5217\u5185\u306e\u500b\u3005\u306e\u8981\u7d20\u3092\u8868\u3057\u307e\u3059\u3002\u7d50\u679c\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
<\/code><\/pre>\n
Output<\/div>\n
<\/code><\/pre>\n
[“Angel”, “Great White”, “Hammerhead”, “Tiger”]<\/p>\n
<\/code><\/pre>\n
\u9bab\u306e\u4e26\u3073\u9806\u3092\u9006\u306b\u3059\u308b\u306b\u306f\u3001\u6bd4\u8f03\u5bfe\u8c61\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u9006\u306b\u3057\u307e\u3059\u3002<\/p>\n
sharks =<\/span> [<\/span>\"Tiger\"<\/span><\/span>,<\/span> \"Great White\"<\/span><\/span>,<\/span> \"Hammerhead\"<\/span><\/span>,<\/span> \"Angel\"<\/span><\/span>]<\/span>\r\nsorted_sharks =<\/span> sharks.<\/span>sort{<\/span>|<\/span>a,<\/span>b|<\/span> b <=><\/span> a }<\/span>\r\nprint sorted_sharks\r\n<\/code><\/pre>\n
<\/code><\/pre>\n
Output<\/div>\n
<\/code><\/pre>\n
[“Tiger”, “Hammerhead”, “Great White”, “Angel”]<\/p>\n
<\/code><\/pre>\n
\u30bd\u30fc\u30c8\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u6574\u6570\u3001\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u3001\u6587\u5b57\u5217\u306a\u3069\u306e\u5358\u7d14\u306a\u30c7\u30fc\u30bf\u578b\u306e\u914d\u5217\u306b\u306f\u975e\u5e38\u306b\u512a\u308c\u3066\u3044\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u3088\u308a\u8907\u96d1\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u542b\u307e\u308c\u308b\u914d\u5217\u306e\u5834\u5408\u3001\u5c11\u3057\u624b\u9593\u3092\u304b\u3051\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
\u6b21\u306f\u3001\u5404\u30cf\u30c3\u30b7\u30e5\u304c\u30b5\u30e1\u3092\u8868\u3057\u3066\u3044\u308b\u914d\u5217\u3067\u3059\u3002<\/p>\n
sharks =<\/span> [<\/span>\r\n{<\/span>name<\/span>:<\/span> \"Hammerhead\"<\/span><\/span>}<\/span>,<\/span>\r\n{<\/span>name<\/span>:<\/span> \"Great white\"<\/span><\/span>}<\/span>,<\/span>\r\n{<\/span>name<\/span>:<\/span> \"Angel\"<\/span><\/span>}<\/span>\r\n]<\/span>\r\n<\/code><\/pre>\n
\u3053\u306e\u914d\u5217\u3092\u30bd\u30fc\u30c8\u3059\u308b\u3053\u3068\u306f\u7c21\u5358\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u914d\u5217\u306b\u30bd\u30fc\u30c8\u3092\u547c\u3073\u51fa\u3059\u3053\u3068\u306f\u5931\u6557\u3057\u307e\u3059\u3002<\/p>\n
sharks.<\/span>sort\r\n<\/code><\/pre>\n
<\/code><\/pre>\n
Output<\/div>\n
<\/code><\/pre>\n
ArgumentError: comparison of Hash with Hash failed<\/p>\n
<\/code><\/pre>\n
\u6bd4\u8f03\u3092\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u30bd\u30fc\u30c8\u306b\u4f55\u3092\u6bd4\u8f03\u3057\u305f\u3044\u304b\u4f1d\u3048\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u30cf\u30c3\u30b7\u30e5\u306e:name\u30ad\u30fc\u306e\u5024\u3092\u6bd4\u8f03\u3057\u307e\u3059\u3002<\/p>\n
sorted_sharks.<\/span>sort{<\/span>|<\/span>a,<\/span> b|<\/span> a[<\/span>:name<\/span>]<\/span> <=><\/span> b[<\/span>:name<\/span>]<\/span>}<\/span>\r\nprint sorted_sharks\r\n<\/code><\/pre>\n
<\/code><\/pre>\n
Output<\/div>\n
<\/code><\/pre>\n
[{:name=>”Angel”}, {:name=>”Great white”}, {:name=>”Hammerhead”}]<\/p>\n
<\/code><\/pre>\n
\u3088\u308a\u8907\u96d1\u306a\u69cb\u9020\u3067\u4f5c\u696d\u3092\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u30bd\u30fc\u30c8\u306b\u3088\u308a\u52b9\u7387\u7684\u306a\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u4f7f\u7528\u3059\u308bsort_by\u30e1\u30bd\u30c3\u30c9\u3092\u691c\u8a0e\u3057\u3066\u307f\u308b\u3053\u3068\u3092\u304a\u3059\u3059\u3081\u3057\u307e\u3059\u3002sort_by\u30e1\u30bd\u30c3\u30c9\u3067\u306f\u3001\u914d\u5217\u5185\u306e\u73fe\u5728\u306e\u8981\u7d20\u3078\u306e\u53c2\u7167\u3068\u3044\u30461\u3064\u306e\u5f15\u6570\u3092\u5fc5\u8981\u3068\u3059\u308b\u30d6\u30ed\u30c3\u30af\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n
sharks =<\/span> [<\/span>\r\n{<\/span>name<\/span>:<\/span> \"Hammerhead\"<\/span><\/span>}<\/span>,<\/span>\r\n{<\/span>name<\/span>:<\/span> \"Great white\"<\/span><\/span>}<\/span>,<\/span>\r\n{<\/span>name<\/span>:<\/span> \"Angel\"<\/span><\/span>}<\/span>\r\n]<\/span>\r\n\r\nsorted_sharks =<\/span> sharks.<\/span>sort_by{<\/span>|<\/span>shark|<\/span> shark[<\/span>:name<\/span>]<\/span> }<\/span>\r\nprint sorted_sharks\r\n<\/code><\/pre>\n
<\/code><\/pre>\n
Output<\/div>\n
<\/code><\/pre>\n
[{:name=>”Angel”}, {:name=>”Great white”}, {:name=>”Hammerhead”}]<\/p>\n
<\/code><\/pre>\n
sort_by\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u7279\u5b9a\u306e\u30ad\u30fc\u306e\u5024\u306b\u57fa\u3065\u3044\u3066\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6bd4\u8f03\u3059\u308b\u306e\u306b\u6700\u9069\u306a\u30bd\u30fc\u30c8\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3067\u3042\u308b\u30b7\u30e5\u30ef\u30eb\u30c4\u30a3\u30a2\u30f3\u5909\u63db\u3092\u5b9f\u88c5\u3057\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u6bd4\u8f03\u3059\u308b\u969b\u306b\u306f\u3001\u52b9\u7387\u7684\u3067\u3042\u308b\u305f\u3081sort_by\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u591a\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n
sort \u3068 sort_by \u306f\u65b0\u3057\u3044\u914d\u5217\u3092\u8fd4\u3057\u3001\u5143\u306e\u914d\u5217\u3092\u305d\u306e\u307e\u307e\u306b\u3057\u307e\u3059\u3002\u5143\u306e\u914d\u5217\u3092\u5909\u66f4\u3057\u305f\u3044\u5834\u5408\u306f\u3001\u4ee3\u308f\u308a\u306b sort! \u3068 sort_by! \u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
\u4e26\u3079\u66ff\u3048\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u91cd\u8907\u3092\u53d6\u308a\u9664\u304d\u305f\u3044\u5834\u5408\u3082\u3042\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n
\u91cd\u8907\u3057\u305f\u8981\u7d20\u3092\u524a\u9664\u3059\u308b\u3002<\/h2>\n
\u6642\u3005\u3001\u91cd\u8907\u304c\u3042\u308b\u30c7\u30fc\u30bf\u306e\u30ea\u30b9\u30c8\u3092\u53d7\u3051\u53d6\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u914d\u5217\u3092\u7e70\u308a\u8fd4\u3057\u3066\u91cd\u8907\u3092\u53d6\u308a\u9664\u304f\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u304c\u3001Ruby\u306euniq\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u3068\u3001\u305d\u308c\u304c\u304b\u306a\u308a\u7c21\u5358\u306b\u306a\u308a\u307e\u3059\u3002uniq\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u91cd\u8907\u3057\u305f\u5024\u3092\u53d6\u308a\u9664\u3044\u305f\u65b0\u3057\u3044\u914d\u5217\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n
[<\/span>1<\/span>,<\/span>2<\/span>,<\/span>3<\/span>,<\/span>4<\/span>,<\/span>1<\/span>,<\/span>5<\/span>,<\/span>3<\/span>]<\/span>.<\/span>uniq # [1,2,3,4,5]<\/span>\r\n<\/code><\/pre>\n
\u6642\u306b\u306f\u30012\u3064\u306e\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u30de\u30fc\u30b8\u3059\u308b\u3068\u3001\u91cd\u8907\u304c\u767a\u751f\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306e2\u3064\u306e\u30b5\u30e1\u306e\u914d\u5217\u3092\u53d6\u308a\u4e0a\u3052\u307e\u3057\u3087\u3046\u3002<\/p>\n
sharks =<\/span> [<\/span>\"Tiger\"<\/span><\/span>,<\/span> \"Great White\"<\/span><\/span>]<\/span>\r\nnew_sharks =<\/span> [<\/span>\"Tiger\"<\/span><\/span>,<\/span> \"Hammerhead\"<\/span><\/span>]<\/span>\r\n<\/code><\/pre>\n
\u305d\u308c\u3089\u3092\u5408\u7b97\u3059\u308c\u3070\u3001\u91cd\u8907\u3057\u305f\u30a8\u30f3\u30c8\u30ea\u304c\u5f97\u3089\u308c\u307e\u3059\u3002 (Sorera o g\u014dsan sureba, j\u016bfuku shita entor\u012b ga eraremasu)<\/p>\n
sharks +<\/span> new_sharks\r\n# [\"Tiger\", \"Great White\", \"Tiger\", \"Hammerhead\"]<\/span>\r\n<\/code><\/pre>\n
\u91cd\u8907\u3092\u524a\u9664\u3059\u308b\u305f\u3081\u306buniq\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u304c\u3001\u305d\u308c\u3089\u3092\u5b8c\u5168\u306b\u907f\u3051\u308b\u65b9\u304c\u30d9\u30bf\u30fc\u3067\u3059\u3002\u914d\u5217\u3092\u8ffd\u52a0\u3059\u308b\u4ee3\u308f\u308a\u306b\u3001\u30d1\u30a4\u30d7\u6f14\u7b97\u5b50|\u3092\u4f7f\u7528\u3057\u3066\u914d\u5217\u3092\u7d50\u5408\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
sharks |<\/span> new_sharks\r\n# [\"Tiger\", \"Great White\", \"Hammerhead\"]<\/span>\r\n<\/code><\/pre>\n
Ruby\u306e\u914d\u5217\u3067\u306f\u3001\u5f15\u304d\u7b97\u3082\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u304a\u308a\u3001new_sharks\u3092sharks\u304b\u3089\u5f15\u304f\u3053\u3068\u3067\u65b0\u3057\u3044\u5024\u306e\u307f\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
sharks =<\/span> [<\/span>\"Tiger\"<\/span><\/span>,<\/span> \"Great White\"<\/span><\/span>]<\/span>\r\nnew_sharks =<\/span> [<\/span>\"Tiger\"<\/span><\/span>,<\/span> \"Hammerhead\"<\/span><\/span>]<\/span>\r\nsharks -<\/span> new_sharks # [\"Great White\"]<\/span>\r\n<\/code><\/pre>\n
\u6b21\u306b\u3001\u5404\u8981\u7d20\u306e\u5024\u3092\u64cd\u4f5c\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
\u30c7\u30fc\u30bf\u306e\u5909\u63db<\/h2>\n
\u30de\u30c3\u30d7\u30e1\u30bd\u30c3\u30c9\u3068\u305d\u306e\u5225\u540d\u3067\u3042\u308b\u30b3\u30ec\u30af\u30c8\u306f\u3001\u914d\u5217\u306e\u5185\u5bb9\u3092\u5909\u63db\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u914d\u5217\u306e\u5404\u8981\u7d20\u306b\u5bfe\u3057\u3066\u64cd\u4f5c\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u4f8b\u3048\u3070\u3001\u914d\u5217\u306e\u5404\u8981\u7d20\u306b\u7b97\u8853\u6f14\u7b97\u3092\u884c\u3044\u3001\u65b0\u3057\u3044\u5024\u3092\u542b\u3093\u3060\u65b0\u3057\u3044\u914d\u5217\u3092\u4f5c\u6210\u3059\u308b\u305f\u3081\u306b\u3001map\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
numbers =<\/span> [<\/span>2<\/span>,<\/span>4<\/span>,<\/span>6<\/span>,<\/span>8<\/span>]<\/span>\r\n\r\n# square each number<\/span>\r\nsquared_numbers =<\/span> numbers.<\/span>map {<\/span>|<\/span>number|<\/span> number *<\/span> number}<\/span>\r\n\r\nprint squared_numbers\r\n<\/code><\/pre>\n
squared_numbers\u5909\u6570\u306f\u3001\u5143\u306e\u6570\u5b57\u3092\u4e8c\u4e57\u3057\u305f\u914d\u5217\u3067\u3059\u3002<\/p>\n
[4, 16, 36, 64]\r\n<\/code><\/pre>\n
\u30de\u30c3\u30d7\u306f\u3001\u30a6\u30a7\u30d6\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u3088\u304f\u4f7f\u308f\u308c\u308b\u305f\u3081\u3001\u914d\u5217\u3092HTML\u306e\u30c9\u30ed\u30c3\u30d7\u30c0\u30a6\u30f3\u30ea\u30b9\u30c8\u306e\u8981\u7d20\u306b\u5909\u63db\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u6b21\u306f\u3001\u305d\u306e\u7c21\u7565\u5316\u3055\u308c\u305f\u30d0\u30fc\u30b8\u30e7\u30f3\u306e\u4e00\u4f8b\u3067\u3059\u3002<\/p>\n
sharks =<\/span> [<\/span>\"Hammerhead\"<\/span><\/span>,<\/span> \"Great White\"<\/span><\/span>,<\/span> \"Tiger\"<\/span><\/span>,<\/span> \"Whale\"<\/span><\/span>]<\/span>\r\n\r\noptions =<\/span> sharks.<\/span>map {<\/span>|<\/span>shark|<\/span> \"<option><\/span>#{<\/span>shark<\/span>}<\/span><\/span><\/option>\"<\/span><\/span>}<\/span>\r\n\r\nprint options\r\n<\/code><\/pre>\n
\u73fe\u5728\u3001\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u914d\u5217\u306b\u306f\u5404\u30b7\u30e3\u30fc\u30af\u304cHTML\u30bf\u30b0\u306e\u3067\u56f2\u307e\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
[\"<option>Hammerhead<\/option>\", \"<option>Great White<\/option>\", \"<option>Tiger<\/option>\", \"<option>Whale<\/option>\"]\r\n<\/code><\/pre>\n
\u30de\u30c3\u30d7\u306f\u65b0\u3057\u3044\u914d\u5217\u3092\u8fd4\u3057\u3001\u5143\u306e\u914d\u5217\u3092\u5909\u66f4\u3057\u307e\u305b\u3093\u3002\u30de\u30c3\u30d7\u3092\u4f7f\u3046\u3068\u65e2\u5b58\u306e\u914d\u5217\u304c\u5909\u66f4\u3055\u308c\u307e\u3059\u3002\u307e\u305f\u3001\u30de\u30c3\u30d7\u306b\u306f\u30b3\u30ec\u30af\u30c8\u3068\u547c\u3070\u308c\u308b\u5225\u540d\u304c\u3042\u308a\u307e\u3059\u3002\u81ea\u5206\u306e\u30b3\u30fc\u30c9\u3067\u306f\u4e00\u8cab\u6027\u3092\u6301\u3063\u3066\u3069\u3061\u3089\u304b\u3092\u4f7f\u3046\u3088\u3046\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
map\u306f\u65b0\u3057\u3044\u914d\u5217\u3092\u8fd4\u3059\u305f\u3081\u3001\u305d\u306e\u914d\u5217\u306f\u3055\u3089\u306b\u5909\u5f62\u3084\u64cd\u4f5c\u304c\u53ef\u80fd\u3067\u3042\u308a\u3001\u6587\u5b57\u5217\u306b\u5909\u63db\u3059\u308b\u3053\u3068\u3055\u3048\u3067\u304d\u307e\u3059\u3002\u6b21\u306f\u305d\u308c\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
\u914d\u5217\u3092\u6587\u5b57\u5217\u306b\u5909\u63db\u3059\u308b<\/h2>\n
Ruby\u306e\u3059\u3079\u3066\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306fto_s\u30e1\u30bd\u30c3\u30c9\u3092\u6301\u3061\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6587\u5b57\u5217\u306b\u5909\u63db\u3057\u307e\u3059\u3002\u3053\u308c\u304cprint\u6587\u304c\u4f7f\u7528\u3059\u308b\u3082\u306e\u3067\u3059\u3002\u79c1\u305f\u3061\u306e\u30b5\u30e1\u306e\u914d\u5217\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
sharks =<\/span> [<\/span>\"Hammerhead\"<\/span><\/span>,<\/span> \"Great White\"<\/span><\/span>,<\/span> \"Tiger\"<\/span><\/span>,<\/span> \"Whale\"<\/span><\/span>]<\/span>\r\n<\/code><\/pre>\n
to_s\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059\u3053\u3068\u3067\u3001\u3053\u306e\u6587\u5b57\u5217\u304c\u4f5c\u6210\u3055\u308c\u307e\u3059\u3002<\/p>\n
\"[\\\"Hammerhead\\\", \\\"Great White\\\", \\\"Tiger\\\", \\\"Whale\\\"]\"<\/span><\/span>\r\n<\/code><\/pre>\n
\u305d\u308c\u306f\u30c7\u30d0\u30c3\u30b0\u306b\u306f\u5f79\u7acb\u3061\u307e\u3059\u304c\u3001\u5b9f\u969b\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u306f\u3042\u307e\u308a\u5f79\u306b\u7acb\u3061\u307e\u305b\u3093\u3002<\/p>\n
join\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u914d\u5217\u3092\u6587\u5b57\u5217\u306b\u5909\u63db\u3057\u307e\u3059\u304c\u3001\u8981\u7d20\u3092\u3069\u306e\u3088\u3046\u306b\u7d50\u5408\u3059\u308b\u304b\u306e\u5236\u5fa1\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002join\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u533a\u5207\u308a\u6587\u5b57\u3068\u3057\u3066\u4f7f\u7528\u3057\u305f\u3044\u6587\u5b57\u3092\u6307\u5b9a\u3059\u308b\u5f15\u6570\u3092\u53d7\u3051\u53d6\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u30b5\u30e1\u306e\u914d\u5217\u3092\u30b9\u30da\u30fc\u30b9\u3067\u533a\u5207\u3089\u308c\u305f\u30b5\u30e1\u306e\u540d\u524d\u306e\u6587\u5b57\u5217\u306b\u5909\u63db\u3059\u308b\u306b\u306f\u3001\u6b21\u306e\u3088\u3046\u306b\u3057\u307e\u3059\uff1a<\/p>\n
\u30b7\u30e3\u30fc\u30af_JOIN.rb<\/div>\n
sharks =<\/span> [<\/span>\"Hammerhead\"<\/span><\/span>,<\/span> \"Great White\"<\/span><\/span>,<\/span> \"Tiger\"<\/span><\/span>,<\/span> \"Whale\"<\/span><\/span>]<\/span>\r\nresult =<\/span> sharks.<\/span>join(<\/span>\" \"<\/span><\/span>)<\/span>\r\nprint result\r\n<\/code><\/pre>\n
<\/code><\/pre>\n
Output<\/div>\n
<\/code><\/pre>\n
Hammerhead Great White Tiger Whale<\/p>\n
<\/code><\/pre>\n
\u3082\u3057\u5404\u9bab\u306e\u540d\u524d\u3092\u30b3\u30f3\u30de\u3068\u30b9\u30da\u30fc\u30b9\u3067\u533a\u5207\u308a\u305f\u3044\u5834\u5408\u306f\u3001\u30c7\u30ea\u30df\u30bf\u3068\u3057\u3066\u30b3\u30f3\u30de\u3068\u30b9\u30da\u30fc\u30b9\u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
\u30b7\u30e3\u30fc\u30af\u306e\u53c2\u52a0\u3092\u7ba1\u7406\u3059\u308b`shark_join.rb`\u30d5\u30a1\u30a4\u30eb<\/div>\n
sharks =<\/span> [<\/span>\"Hammerhead\"<\/span><\/span>,<\/span> \"Great White\"<\/span><\/span>,<\/span> \"Tiger\"<\/span><\/span>,<\/span> \"Whale\"<\/span><\/span>]<\/span>\r\nresult =<\/span> sharks.<\/span>join(<\/span>\", \"<\/span><\/span>)<\/span>\r\nprint result\r\n<\/code><\/pre>\n
<\/code><\/pre>\n
Output<\/div>\n
<\/code><\/pre>\n
Hammerhead, Great White, Tiger, Whale<\/p>\n
<\/code><\/pre>\n
\u5f15\u6570\u3092\u6307\u5b9a\u3057\u306a\u3044\u5834\u5408\u3001join\u30e1\u30bd\u30c3\u30c9\u3067\u3082\u6587\u5b57\u5217\u306f\u8fd4\u3055\u308c\u307e\u3059\u304c\u3001\u533a\u5207\u308a\u6587\u5b57\u304c\u542b\u307e\u308c\u307e\u305b\u3093\u3002<\/p>\n
\u30b7\u30e3\u30fc\u30af\u7d50\u5408.rb<\/div>\n
sharks =<\/span> [<\/span>\"Hammerhead\"<\/span><\/span>,<\/span> \"Great White\"<\/span><\/span>,<\/span> \"Tiger\"<\/span><\/span>,<\/span> \"Whale\"<\/span><\/span>]<\/span>\r\nresult =<\/span> sharks.<\/span>join\r\nprint result\r\n<\/code><\/pre>\n
<\/code><\/pre>\n
Output<\/div>\n
<\/code><\/pre>\n
HammerheadGreat WhiteTigerWhale<\/p>\n
<\/code><\/pre>\n
join\u3068map\u3092\u4f75\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u306e\u914d\u5217\u3092\u51fa\u529b\u306b\u5909\u63db\u3059\u308b\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305a\u3001map\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u306e\u5404\u8981\u7d20\u3092\u5909\u63db\u3057\u3001\u6b21\u306bjoin\u3092\u4f7f\u7528\u3057\u3066\u305d\u308c\u3089\u5168\u4f53\u3092\u6539\u884c\u6587\u5b57\u3092\u533a\u5207\u308a\u3068\u3057\u305f\u6587\u5b57\u5217\u306b\u5909\u63db\u3057\u307e\u3059\u3002\u79c1\u305f\u3061\u304c\u4ee5\u524d\u306b\u30b7\u30e3\u30fc\u30af\u306e\u914d\u5217\u3092HTML\u8981\u7d20\u306e\u914d\u5217\u306b\u5909\u63db\u3059\u308b\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3057\u305f\u3088\u306d\uff1f\u540c\u3058\u4f8b\u3067\u3059\u304c\u3001\u4eca\u56de\u306fjoin\u3092\u4f7f\u7528\u3057\u3066\u8981\u7d20\u306e\u914d\u5217\u3092\u6539\u884c\u6587\u5b57\u3092\u533a\u5207\u308a\u3068\u3057\u305f\u6587\u5b57\u5217\u306b\u5909\u63db\u3057\u307e\u3059\u3002<\/p>\n
\u30de\u30c3\u30d7.rb<\/div>\n
sharks =<\/span> [<\/span>\"Hammerhead\"<\/span><\/span>,<\/span> \"Great White\"<\/span><\/span>,<\/span> \"Tiger\"<\/span><\/span>,<\/span> \"Whale\"<\/span><\/span>]<\/span>\r\noptions =<\/span> sharks.<\/span>map {<\/span>|<\/span>shark|<\/span> \"<option><\/span>#{<\/span>shark<\/span>}<\/span><\/span><\/option>\"<\/span><\/span>}<\/span>\r\noutput =<\/span> options.<\/span>join(<\/span>\"\\n\"<\/span><\/span>)<\/span>\r\nprint output\r\n<\/code><\/pre>\n
<\/code><\/pre>\n
Output<\/div>\n
<\/code><\/pre>\n
<option>Hammerhead<\/option> <option>Great White<\/option> <option>Tiger<\/option> <option>Whale<\/option><\/p>\n
<\/code><\/pre>\n
\u914d\u5217\u3092\u6587\u5b57\u5217\u306b\u5909\u63db\u3059\u308b\u4ee3\u308f\u308a\u306b\u3001\u305d\u306e\u5185\u5bb9\u306e\u7dcf\u8a08\u3092\u6c42\u3081\u305f\u308a\u3001\u4ed6\u306e\u7a2e\u985e\u306e\u5909\u63db\u3092\u884c\u3063\u3066\u5358\u4e00\u306e\u5024\u3092\u5f97\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u305d\u308c\u304c\u6b21\u306b\u53d6\u308a\u7d44\u3080\u5185\u5bb9\u3067\u3059\u3002<\/p>\n
\u914d\u5217\u3092\u5358\u4e00\u306e\u5024\u306b\u7e2e\u5c0f\u3059\u308b<\/h2>\n
\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u4f7f\u7528\u3057\u3066\u4f5c\u696d\u3092\u884c\u3063\u3066\u3044\u308b\u5834\u5408\u3001\u5408\u8a08\u306a\u3069\u306e\u5358\u4e00\u306e\u5024\u306b\u30c7\u30fc\u30bf\u3092\u96c6\u7d04\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3092\u884c\u3046\u65b9\u6cd5\u306e1\u3064\u306f\u3001\u5909\u6570\u3068each\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n
result =<\/span> 0<\/span>\r\n[<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>]<\/span>.<\/span>each<\/span> {<\/span>|<\/span>num|<\/span> result +=<\/span> num}<\/span>\r\nprint result\r\n<\/code><\/pre>\n
<\/code><\/pre>\n
Output<\/div>\n
<\/code><\/pre>\n
6<\/p>\n
<\/code><\/pre>\n
\u4ee3\u308f\u308a\u306b\u3001\u3053\u306e\u64cd\u4f5c\u3092\u884c\u3046\u305f\u3081\u306breduce\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002reduce\u30e1\u30bd\u30c3\u30c9\u306f\u914d\u5217\u3092\u53cd\u5fa9\u51e6\u7406\u3057\u3001\u5404\u8981\u7d20\u306b\u5bfe\u3057\u3066\uff12\u9805\u6f14\u7b97\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u3067\u7d2f\u7a4d\u5408\u8a08\u3092\u4fdd\u6301\u3057\u307e\u3059\u3002<\/p>\n
reduce\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u7d50\u679c\u306e\u521d\u671f\u5024\u3068\u3068\u3082\u306b\u3001\u7d50\u679c\u3078\u306e\u53c2\u7167\u3068\u73fe\u5728\u306e\u8981\u7d20\u3078\u306e\u53c2\u7167\u3092\u6301\u3064\u30d6\u30ed\u30c3\u30af\u3092\u53d7\u3051\u5165\u308c\u307e\u3059\u3002\u30d6\u30ed\u30c3\u30af\u5185\u3067\u3001\u6700\u7d42\u7d50\u679c\u3092\u8a08\u7b97\u3059\u308b\u305f\u3081\u306e\u30ed\u30b8\u30c3\u30af\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n
\u914d\u5217\u3092\u5408\u8a08\u3057\u305f\u3044\u306e\u3067\u3001\u7d50\u679c\u30920\u3067\u521d\u671f\u5316\u3057\u3001\u30d6\u30ed\u30c3\u30af\u5185\u3067\u73fe\u5728\u306e\u5024\u3092\u7d50\u679c\u306b\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/p>\n
output =<\/span> [<\/span>1<\/span>,<\/span>2<\/span>,<\/span>3<\/span>]<\/span>.<\/span>reduce(<\/span>0<\/span>)<\/span> {<\/span>|<\/span>result,<\/span> current|<\/span> result +=<\/span> current }<\/span>\r\nprint output\r\n<\/code><\/pre>\n
<\/code><\/pre>\n
Output<\/div>\n
<\/code><\/pre>\n
6<\/p>\n
<\/code><\/pre>\n
\u3082\u3057\u7d50\u679c\u30920\u3067\u521d\u671f\u5316\u3059\u308b\u4e88\u5b9a\u3067\u3042\u308c\u3070\u3001\u5f15\u6570\u3092\u7701\u7565\u3057\u3001\u5358\u306b\u30d6\u30ed\u30c3\u30af\u3092\u6e21\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u81ea\u52d5\u7684\u306b\u7d50\u679c\u306f\u914d\u5217\u306e\u6700\u521d\u306e\u5024\u306b\u8a2d\u5b9a\u3055\u308c\u307e\u3059\u3002<\/p>\n
output =<\/span> [<\/span>1<\/span>,<\/span>2<\/span>,<\/span>3<\/span>]<\/span>.<\/span>reduce {<\/span>|<\/span>result,<\/span> current|<\/span> result +=<\/span> current }<\/span>\r\nprint output\r\n<\/code><\/pre>\n
<\/code><\/pre>\n
Output<\/div>\n
<\/code><\/pre>\n
6<\/p>\n
<\/code><\/pre>\n
\u300creduce\u300d\u30e1\u30bd\u30c3\u30c9\u3067\u306f\u3001\u914d\u5217\u5185\u306e\u5404\u30a8\u30f3\u30c8\u30ea\u30fc\u306b\u5bfe\u3057\u3066\u3001\u30d0\u30a4\u30ca\u30ea\u30e1\u30bd\u30c3\u30c9\u307e\u305f\u306f\u5225\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u5f15\u6570\u3068\u3057\u3066\u53d7\u3051\u5165\u308c\u308b\u30e1\u30bd\u30c3\u30c9\u3092\u6307\u5b9a\u3057\u3066\u5b9f\u884c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305d\u306e\u7d50\u679c\u3092\u4f7f\u3063\u3066\u3001\u300creduce\u300d\u306f\u5358\u4e00\u306e\u5024\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n
Ruby\u30672 + 2 \u3092\u66f8\u304f\u3068\u3001\u5b9f\u969b\u306b\u306f\u6574\u6570\u306e2\u306b\u5bfe\u3057\u3066+\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
2.<\/span>+<\/span>(<\/span>2<\/span>)<\/span> # 4<\/span>\r\n<\/code><\/pre>\n
Ruby\u306f\u3044\u304f\u3064\u304b\u306e\u6587\u6cd5\u7684\u306a\u7cd6\u8863\u69cb\u6587\u3092\u4f7f\u7528\u3057\u3066\u304a\u308a\u30012 + 2\u3068\u8868\u73fe\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
reduce\u30e1\u30bd\u30c3\u30c9\u3067\u306f\u3001\u30b7\u30f3\u30dc\u30eb\u3068\u3057\u3066\u305d\u306e\u540d\u524d\u3092\u6e21\u3059\u3053\u3068\u3067\u3001\u30d0\u30a4\u30ca\u30ea\u30e1\u30bd\u30c3\u30c9\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u914d\u5217\u3092\u5408\u8a08\u3059\u308b\u305f\u3081\u306breduce\u30e1\u30bd\u30c3\u30c9\u306b:+\u3092\u6e21\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
output =<\/span> [<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>]<\/span>.<\/span>reduce(<\/span>:<\/span>+<\/span>)<\/span>\r\nprint output\r\n<\/code><\/pre>\n
<\/code><\/pre>\n
Output<\/div>\n
<\/code><\/pre>\n
6<\/p>\n
<\/code><\/pre>\n
reduce\u3092\u4f7f\u3048\u3070\u3001\u5358\u306b\u6570\u5024\u306e\u30ea\u30b9\u30c8\u3092\u5408\u8a08\u3059\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u5024\u3092\u5909\u63db\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002reduce\u306f\u914d\u5217\u3092\u5358\u4e00\u306e\u5024\u306b\u307e\u3068\u3081\u308b\u3053\u3068\u3092\u899a\u3048\u3066\u304a\u3044\u3066\u304f\u3060\u3055\u3044\u3002\u305f\u3060\u3057\u3001\u305d\u306e\u5358\u4e00\u306e\u5024\u304c\u5225\u306e\u914d\u5217\u3067\u3042\u3063\u3066\u306f\u306a\u3089\u306a\u3044\u3068\u3044\u3046\u30eb\u30fc\u30eb\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n
\u4eee\u306b\u6574\u6570\u306b\u5909\u63db\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5024\u306e\u30ea\u30b9\u30c8\u304c\u3042\u308b\u3068\u3057\u307e\u3057\u3087\u3046\u304c\u3001\u6574\u6570\u306b\u5909\u63db\u53ef\u80fd\u306a\u5024\u306e\u307f\u3092\u53d6\u5f97\u3057\u305f\u3044\u3067\u3059\u3002<\/p>\n
\u975e\u6570\u5024\u306e\u5024\u3092\u6392\u9664\u3059\u308b\u305f\u3081\u306breject\u3092\u4f7f\u7528\u3057\u3001\u6b8b\u308a\u306e\u5024\u3092\u6574\u6570\u306b\u5909\u63db\u3059\u308b\u305f\u3081\u306bmap\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3057\u304b\u3057\u3001reduce\u3092\u4f7f\u3063\u3066\u4e00\u3064\u306e\u624b\u9806\u3067\u5168\u3066\u3092\u884c\u3046\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n
\u521d\u671f\u5024\u3068\u3057\u3066\u7a7a\u306e\u914d\u5217\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u6b21\u306b\u3001\u30d6\u30ed\u30c3\u30af\u5185\u3067\u73fe\u5728\u306e\u5024\u3092Integer\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u6574\u6570\u306b\u5909\u63db\u3057\u307e\u3059\u3002\u5024\u304c\u6574\u6570\u306b\u5909\u63db\u3067\u304d\u306a\u3044\u5834\u5408\u306f\u3001Integer\u304c\u4f8b\u5916\u3092\u767a\u751f\u3055\u305b\u307e\u3059\u3002\u3053\u306e\u4f8b\u5916\u3092\u30ad\u30e3\u30c3\u30c1\u3057\u3066\u3001\u5024\u306bnil\u3092\u5272\u308a\u5f53\u3066\u307e\u3059\u3002<\/p>\n
\u305d\u306e\u5024\u3092\u914d\u5217\u306b\u5165\u308c\u3066\u304f\u3060\u3055\u3044\u304c\u3001nil\u3067\u306a\u3044\u5834\u5408\u306e\u307f\u3067\u3059\u3002<\/p>\n
\u30b3\u30fc\u30c9\u306e\u898b\u305f\u76ee\u306f\u3053\u3061\u3089\u3067\u3059\u3002\u3053\u308c\u3092\u8a66\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
\u300cconvert_array_of_values.rb\u300d\u3092\u65e5\u672c\u8a9e\u306b\u5909\u63db\u3057\u307e\u3059\u3002<\/div>\n
values =<\/span> [<\/span>\"1\"<\/span><\/span>,<\/span> \"2\"<\/span><\/span>,<\/span> \"a\"<\/span><\/span>,<\/span> \"3\"<\/span><\/span>]<\/span>\r\nintegers =<\/span> values.<\/span>reduce(<\/span>[<\/span>]<\/span>)<\/span> do<\/span> |<\/span>array,<\/span> current|<\/span>\r\nval =<\/span> Integer<\/span>(<\/span>current)<\/span> rescue<\/span> nil<\/span>\r\narray.<\/span>push(<\/span>val)<\/span> unless<\/span> val.<\/span>nil<\/span>?<\/span>\r\narray\r\nend<\/span>\r\nprint integers\r\n<\/code><\/pre>\n
<\/code><\/pre>\n
Output<\/div>\n
<\/code><\/pre>\n
[1,2,3]<\/p>\n
<\/code><\/pre>\n
\u30ea\u30b9\u30c8\u5185\u306e\u8981\u7d20\u3092\u5358\u4e00\u306e\u5024\u306b\u5909\u63db\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u3001reduce\u3092\u4f7f\u7528\u3057\u3066\u89e3\u6c7a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
\u3053\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3067\u306f\u3001\u914d\u5217\u3092\u64cd\u4f5c\u3059\u308b\u305f\u3081\u306b\u3044\u304f\u3064\u304b\u306e\u65b9\u6cd5\u3092\u4f7f\u7528\u3057\u307e\u3057\u305f\u3002\u500b\u3005\u306e\u8981\u7d20\u3092\u53d6\u5f97\u3057\u3001\u914d\u5217\u3092\u691c\u7d22\u3057\u3066\u5024\u3092\u53d6\u5f97\u3057\u3001\u8981\u7d20\u3092\u4e26\u3079\u66ff\u3048\u3001\u30c7\u30fc\u30bf\u3092\u5909\u63db\u3057\u3066\u65b0\u3057\u3044\u914d\u5217\u3084\u6587\u5b57\u5217\u3001\u7dcf\u8a08\u3092\u4f5c\u6210\u3057\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u306e\u6982\u5ff5\u3092\u4f7f\u3063\u3066\u3001Ruby\u3092\u7528\u3044\u3066\u591a\u304f\u306e\u4e00\u822c\u7684\u306a\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u554f\u984c\u3092\u89e3\u6c7a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u3053\u308c\u3089\u306e\u95a2\u9023\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3092\u898b\u3066\u3001\u30c7\u30fc\u30bf\u3092Ruby\u3067\u6271\u3046\u65b9\u6cd5\u3092\u3055\u3089\u306b\u63a2\u7d22\u3059\u308b\u3053\u3068\u3092\u5fd8\u308c\u305a\u306b\u3002<\/p>\n
    \n
  • How to Work with Strings in Ruby<\/li>\n
  • How To Work with Arrays in Ruby<\/li>\n
  • Understanding Data Types in Ruby<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
    \u30a4\u30f3\u30c8\u30ed\u30c0\u30af\u30b7\u30e7\u30f3 \u914d\u5217\u306f\u30d7\u30ed\u30b0\u30e9\u30e0\u5185\u3067\u30c7\u30fc\u30bf\u306e\u30ea\u30b9\u30c8\u3092\u8868\u73fe\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u914d\u5217\u306b\u30c7\u30fc\u30bf\u304c\u3042\u308b\u5834\u5408\u3001\u30bd\u30fc\u30c8\u3057\u305f\u308a\u3001\u91cd\u8907\u3092\u524a\u9664\u3057\u305f\u308a\u3001\u9806\u5e8f\u3092\u9006\u306b\u3057\u305f\u308a\u3001\u914d\u5217\u306e\u4e00\u90e8\u3092\u62bd\u51fa\u3057\u305f\u308a\u3001\u7279\u5b9a\u306e\u30c7\u30fc\u30bf\u3092\u691c\u7d22\u3057\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059 […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[16,26],"class_list":["post-40","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-16","tag-26"],"yoast_head":"\nRuby\u3067\u306e\u914d\u5217\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Ruby\u3067\u306e\u914d\u5217\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u5b9f\u8df5\u7684\u306a\u4f8b\u3068\u30b3\u30fc\u30c9\u3001\u6ce8\u610f\u70b9\u3092\u542b\u3081\u3066\u521d\u5fc3\u8005\u306b\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u8aac\u660e\u3057\u307e\u3059\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/ja\/blog\/ruby\u3067\u306e\u914d\u5217\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u7528\u65b9\u6cd5\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ruby\u3067\u306e\u914d\u5217\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9\" \/>\n<meta property=\"og:description\" content=\"Ruby\u3067\u306e\u914d\u5217\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u5b9f\u8df5\u7684\u306a\u4f8b\u3068\u30b3\u30fc\u30c9\u3001\u6ce8\u610f\u70b9\u3092\u542b\u3081\u3066\u521d\u5fc3\u8005\u306b\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u8aac\u660e\u3057\u307e\u3059\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/ruby\u3067\u306e\u914d\u5217\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u7528\u65b9\u6cd5\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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