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module ZBase32
ALPHABET = 'ybndrfg8ejkmcpqxot1uwisza345h769'.split('').freeze
def self.encode32(bin_string)
bin_string.scan(/[01]{1,5}/).map do |bits|
ALPHABET[bits.ljust(5, '0').to_i(2)]
end.join
end
def self.decode32(enc)
bin = enc.split('').map do |char|
ALPHABET.index(char).to_s(2).rjust(5, '0')
end.join
bin[0, (8 * (bin.length / 8))]
# .sub /10*$/ ,'1'
end
end
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