hex to binary

htob

str = ARGF.argv[0].strip.downcase

if str.start_with? '0x'
	str.delete! '0x'
end


str.each_char do |c|
	bin = c.to_i(16).to_s(2)
	bin.insert(0, '0' * (4-bin.length)) if bin.length < 4

	print "#{bin} "
end

print "\n"