Ruby 3.1.3ãRails 6.0.6ã§å®è£ ããéã®è©±ã§ãã irb(main):009:0> str = NKF.nkf('-x --ic=UTF-8 --oc=Shift_JIS', 'オオï¾ï¾') => "\xB5\xB5\xD3\xD8" irb(main):010:0> str.force_encoding('UTF-8') => "\xB5\xB5\xD3\xD8" irb(main):011:0> str = NKF.nkf('-x --oc=Shift_JIS', str) => "\x{8B54}\x{9A77}" irb(main):012:0> NKF.nkf('-x --ic=Shift_JIS --oc=UTF-8', str) => "äºå¹" NKFã®--ic ãªãã·ã§ã³ã¯å ¥åã¨ã³ã³ã¼ãã£ã³ã°ã--ocãªãã·ã§ã³ã¯åºåã¨ã³ã³ã¼ãã£ã³ã°ã ä¸è¨ã§ã¯Strin
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