UTF-8 日本語文字列を Shift_JIS とみなした文字化けの表 - Qiita

#!/usr/bin/ruby def hankaku b case b when 0xA1..0xDF [b].pack('C').encode(Encoding::UTF_8, Encoding::Shift_JIS) when nil '' else format('\\x%02x', b) end end (0xA1..0xF4).each {|bhi| (0xA1..0xFE).each {|blo| echar = [bhi, blo].pack('CC').force_encoding(Encoding::EUC_JP) begin uchar = echar.encode(Encoding::UTF_8) rescue Encoding::UndefinedConversionError next end uhex = uchar.unpack('H*').first sl