英數字半形轉全形

convert_to_wide_word.rb

def convert_to_wide_word(text)
  text.gsub(/[a-v]/){|a|(a.ord + 41608).chr('big5').encode('utf-8')}
    .gsub(/[w-z]/){|a|(a.ord + 41673).chr('big5').encode('utf-8')}
    .gsub(/[A-Z]/){|a|(a.ord + 41614).chr('big5').encode('utf-8')}
    .gsub(/[0-9]/){|a|(a.ord + 41599).chr('big5').encode('utf-8')}
end

> convert_to_wide_word("0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
 => "０１２３４５６７８９ａｂｃｄｅｆｇｈｉｊｋｌｍｎｏｐｑｒｓｔｕｖｗｘｙｚＡＢＣＤＥＦＧＨＩＪＫＬ
 ＭＮＯＰＱＲＳＴＵＶＷＸＹＺ"