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require 'optparse'
parser = OptionParser.new
parser.on(
'--xxx',
'Option with no argument',
->(value) {p ['Handler proc for -xxx called with value:', value]}
)
parser.on(
'--yyy YYY',
'Option with required argument',
->(value) {p ['Handler proc for -yyy called with value:', value]}
)
parser.parse!
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