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Ruby – バイナリと16進数のHEXを相互変換する

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コード例

def bin_to_hex(str)
  str.each_byte.map { |b| b.to_s(16).rjust(2, '0') }.join
end

def hex_to_bin(hex)
  [hex].pack('H*')
end

bin_to_hex(binary_string)

hex_to_bin(hex_string)

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