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koichiro/hex2bin.rb

Created June 25, 2014 02:27
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hex2bin.rb
# "\x34AC23"
def hex2bin s
s = s[2, s.length]
raise "Not a valid hex string" unless(s =~ /^[\da-fA-F]+$/)
r = s.scan(/../).map{ |b| b.to_i(16) }.pack('C*')
r.force_encoding("UTF-8")
end
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