Ruby åŠè§’å…¨è§’å¤‰æ› [カタカナ, 英数å—, ã²ã‚‰ãŒãª] – ãªãˆã®ãƒ¡ãƒ¢å¸³å…¨è§’→åŠè§’＆åŠè§’→全角 NKF.nkf('-w -Z4', 'カタカナｶﾀｶﾅ') => "ｶﾀｶﾅカタカナ" 全角→åŠè§’ NKF.nkf('-w -Z4 -x', 'カタカナｶﾀｶﾅ') => "ｶﾀｶﾅｶﾀｶﾅ" åŠè§’→全角 NKF.nkf('-w -X', 'カタカナｶﾀｶﾅ') => "カタカナカタカナ" 全角→åŠè§’ NKF.nkf('-w -Z4', 'ＡＢＣï¼ï¼‘ï¼’') => "ABC012" 'ＡＢＣï¼ï¼‘ï¼’'.tr("Ａ-Ｚï¼-ï¼™","A-Z0-9") => "ABC012" åŠè§’→全角 'ABC012'.tr("A-Z0-9","Ａ-Ｚï¼-ï¼™") => "ＡＢＣï¼ï¼‘ï¼’" NKFã§ã¯åŠè§’英数å—ã‹ã‚‰å…¨è§’英数å—ã«ã¯å¤‰æ›ã¯ã§ãã¾ã›ã‚“ã§ã—ãŸã€‚ ã²ã‚‰ãŒãªâ†’全角カタカナ 'ã²ã‚‰ãŒãª'.tr('ã‚-ã‚“', 'ã‚¢-ン') => "ヒラガナ" ã²ã‚‰ãŒãªâ†’åŠè§’カタカナ NKF.nkf('-w -Z
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