{"id":38653,"date":"2024-11-20T05:35:09","date_gmt":"2024-11-20T05:35:09","guid":{"rendered":"https:\/\/www.railscarma.com\/?p=38653"},"modified":"2024-11-20T05:36:48","modified_gmt":"2024-11-20T05:36:48","slug":"ruby%e3%82%b1%e3%83%bc%e3%82%b9%e3%83%bb%e3%82%b9%e3%83%86%e3%83%bc%e3%83%88%e3%83%a1%e3%83%b3%e3%83%88%e5%85%a5%e9%96%80","status":"publish","type":"post","link":"https:\/\/www.railscarma.com\/ja\/%e3%83%96%e3%83%ad%e3%82%b0\/ruby%e3%82%b1%e3%83%bc%e3%82%b9%e3%83%bb%e3%82%b9%e3%83%86%e3%83%bc%e3%83%88%e3%83%a1%e3%83%b3%e3%83%88%e5%85%a5%e9%96%80\/","title":{"rendered":"Ruby\u30b1\u30fc\u30b9\u6587\u5165\u9580\u30ac\u30a4\u30c9"},"content":{"rendered":"
\n\t\t\t\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

\u306b\u3064\u3044\u3066 <\/span>\u30b1\u30fc\u30b9<\/span> \u6587\u306f\u3001\u8907\u6570\u306e\u6761\u4ef6\u3092\u3059\u3063\u304d\u308a\u3068\u8aad\u307f\u3084\u3059\u3044\u5f62\u5f0f\u3067\u6271\u3046\u305f\u3081\u306e\u3001\u591a\u7528\u9014\u3067\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u3067\u3059\u3002\u3053\u306e\u30ac\u30a4\u30c9\u3067\u306f\u3001\u521d\u5fc3\u8005\u306e\u65b9\u306b\u3082\u3001\u5fa9\u7fd2\u304c\u5fc5\u8981\u306a\u65b9\u306b\u3082\u3001Ruby\u306b\u304a\u3051\u308b <\/span>\u30b1\u30fc\u30b9<\/span> \u3068\u3044\u3046\u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u3092\u3001\u5b9f\u8df5\u7684\u306a\u4f8b\u6587\u3068\u3068\u3082\u306b\u7d39\u4ecb\u3057\u3001\u7406\u89e3\u3092\u6df1\u3081\u308b\u3002<\/span><\/p>\n

Ruby Case Statement\u3068\u306f\uff1f<\/b><\/h2>\n

\u3042 <\/span>\u30b1\u30fc\u30b9<\/span> \u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u306f <\/span>if-elif-else<\/span> \u30b3\u30fc\u30c9\u3092\u3088\u308a\u7c21\u6f54\u3067\u8aad\u307f\u3084\u3059\u304f\u3059\u308b\u305f\u3081\u306b\u8a2d\u8a08\u3055\u308c\u305f\u3002\u5f0f\u3092\u8a55\u4fa1\u3057\u3001\u4e00\u81f4\u3059\u308b\u6761\u4ef6\u306b\u57fa\u3065\u3044\u3066\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3059\u308b\u3002<\/span><\/p>\n

\u57fa\u672c\u69cb\u6587<\/b><\/h3>\n
\u5834\u5408\u5f0f\nwhen \u6761\u4ef61
<\/span>  # \u6761\u4ef61\u304c\u771f\u306e\u5834\u5408\u306b\u5b9f\u884c\u3055\u308c\u308b\u30b3\u30fc\u30c9
<\/span>when \u6761\u4ef62
<\/span>  # \u6761\u4ef62\u304c\u771f\u306e\u5834\u5408\u306b\u5b9f\u884c\u3055\u308c\u308b\u30b3\u30fc\u30c9
<\/span>\u305d\u308c\u4ee5\u5916
<\/span>  # \u6761\u4ef6\u306b\u4e00\u81f4\u3057\u306a\u3044\u5834\u5408\u306b\u5b9f\u884c\u3059\u308b\u30b3\u30fc\u30c9
<\/span>\u7d42\u308f\u308a<\/span><\/pre>\n
<\/p>\n
\u4f8b1\uff1a\u5358\u7d14\u306a\u30b1\u30fc\u30b9\u30fb\u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8<\/b><\/h3>\n
\u30eb\u30d3\u30fc<\/span><\/p>\n
\u30b3\u30d4\u30fc\u30b3\u30fc\u30c9
<\/span>day = \"\u6708\u66dc\u65e5\"
<\/span>\u30b1\u30fc\u30b9\u30c7\u30fc
<\/span>\u6708\u66dc\u65e5\n \u306f \"\u4ed5\u4e8b\u59cb\u3081\uff01\"\u3068\u8868\u793a\u3059\u308b\u3002\n\u91d1\u66dc\u65e5\" \u306e\u5834\u5408\n  \"\u3082\u3046\u3059\u3050\u9031\u672b\uff01\"\n\u3067\u306a\u3051\u308c\u3070\n  \"Just another day.\" \u3068\u8868\u793a\u3057\u307e\u3059\u3002\n\u7d42\u4e86<\/pre>\n
<\/p>\n
\u51fa\u529b\uff1a<\/b>
<\/b>\u9031\u306e\u59cb\u307e\u308a\uff01<\/span><\/p>\n
<\/p>\n
\u4f8b 2: \u7bc4\u56f2\u306e\u4f7f\u7528<\/b><\/h3>\n
\u5185\u306e\u5024\u306e\u7bc4\u56f2\u306b\u4e00\u81f4\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 <\/span>\u30b1\u30fc\u30b9<\/span> \u3068\u3044\u3046\u58f0\u660e\u3092\u767a\u8868\u3057\u305f\u3002<\/span><\/p>\n
\u30b0\u30ec\u30fc\u30c9 = 85\n\n\u30b1\u30fc\u30b9\u30b0\u30ec\u30fc\u30c9\n\n90\uff5e100\u306e\u5834\u5408\n\n  \u512a\u79c0\u300d\u3068\u8868\u793a\n\n80\uff5e89\u306e\u3068\u304d\n\n  \u306f \"Good \"\u3068\u8868\u793a\n\n70\uff5e79\u306e\u3068\u304d\n\n  \u5e73\u5747\n\n\u3067\u306a\u3051\u308c\u3070\n\n  puts \"\u6539\u5584\u304c\u5fc5\u8981\"\n\n\u7d42\u4e86<\/pre>\n
<\/p>\n
\u51fa\u529b\uff1a<\/b>
<\/b>\u30b0\u30c3\u30c9<\/span><\/p>\n
<\/p>\n
\u4f8b3\uff1a1\u884c\u306b\u8907\u6570\u306e\u6761\u4ef6<\/b><\/h3>\n
\u6761\u4ef6\u3092\u30ab\u30f3\u30de\u3067\u307e\u3068\u3081\u308b\u3068\u308f\u304b\u308a\u3084\u3059\u3044\u3002<\/span><\/p>\n
\u5929\u6c17 = \"\u96e8\"\n\n\u5929\u6c17\n\n\u6674\u308c\u300d\u300c\u4e00\u90e8\u66c7\u308a\u300d\u306e\u5834\u5408\n\n  \u6563\u6b69\u306b\u884c\u3053\u3046\n\n\u96e8\u300d\u300c\u5d50\u300d\u306e\u5834\u5408\n\n  \u306f \"\u5c4b\u5185\u306b\u3044\u308d \"\u3068\u8a00\u3046\u3002\n\n\u305d\u306e\u4ed6\n\n  \"\u5929\u6c17\u4e88\u5831\u3092\u30c1\u30a7\u30c3\u30af\"\n\n\u7d42\u4e86<\/pre>\n
<\/p>\n
\u51fa\u529b\uff1a<\/b>
<\/b>\u5c4b\u5185\u306b\u3044\u308d\u3002<\/span><\/p>\n
<\/p>\n
\u4f8b4:\u6b21\u306e\u3088\u3046\u306b\u4f7f\u7528\u3059\u308b <\/b>\u30b1\u30fc\u30b9<\/b> \u3068 <\/b>\u3067\u306f<\/b><\/h3>\n
\u3088\u308a\u77ed\u3044\u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u306b\u306f <\/span>\u3067\u306f<\/span> \u3092\u30a4\u30f3\u30e9\u30a4\u30f3\u3067\u5b9f\u884c\u3059\u308b\u3002<\/span><\/p>\n
\u6570 = 5
<\/span>\u30b1\u30fc\u30b9\u756a\u53f7
<\/span>1\u306e\u3068\u304d\u3001\"One \"\u3092\u7f6e\u304f
<\/span>5\u306e\u3068\u304d\u3001\"Five \"\u3068\u8868\u793a\u3059\u308b
<\/span>else puts \"\u305d\u306e\u4ed6\u306e\u756a\u53f7\"
<\/span>\u7d42\u308f\u308a<\/span><\/pre>\n
<\/p>\n
\u51fa\u529b\uff1a<\/b>
<\/b>\u30d5\u30a1\u30a4\u30d6<\/span><\/p>\n
<\/p>\n
\u4f8b5\uff1a\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0 <\/b>\u30b1\u30fc\u30b9<\/b><\/h3>\n
Ruby 2.7\u3067\u5c0e\u5165\u3055\u308c\u305f\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u306f\u3001\u4ee5\u4e0b\u306e\u6a5f\u80fd\u3092\u3055\u3089\u306b\u5f37\u5316\u3057\u305f\u3002 <\/span>\u30b1\u30fc\u30b9<\/span>.<\/span><\/p>\n
\u5024 = [1, 2, 3\uff3d\n\n\u30b1\u30fc\u30b9\u5024\n\nin [1, _, _]\n\n  puts \"1\u304b\u3089\u59cb\u307e\u308b\"\n\nin [_, _, 3\uff3d\n\n  puts \"3\u3067\u7d42\u308f\u308b\"\n\n\u305d\u306e\u4ed6\n\n  puts \"\u7570\u306a\u308b\u30d1\u30bf\u30fc\u30f3\"\n\n\u7d42\u4e86\n<\/pre>\n
<\/p>\n
\u51fa\u529b\uff1a<\/b>
<\/b>1\u304b\u3089\u59cb\u307e\u308b<\/span><\/p>\n
<\/p>\n
Ruby\u306eCase\u6587\u306f\u3044\u3064\u4f7f\u3046\u306e\u304b\uff1f<\/b><\/h2>\n