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require 'optparse'
parser = OptionParser.new
parser.on('-x', '--xxx', 'Short and long, no argument')
parser.on('-yYYY', '--yyy', 'Short and long, required argument')
parser.on('-z [ZZZ]', '--zzz', 'Short and long, optional argument')
options = {}
parser.parse!(into: options)
p options
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