ruby--ruby/doc/optparse/ruby/default_values.rb

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 = {yyy: 'AAA', zzz: 'BBB'}
parser.parse!(into: options)
p options
[ruby/optparse] More on tutorial (#16) - Added example in "Argument Converters"; it doesn't seem right for a tutorial to have no example in one of its topics (and instead just linking elsewhere). - Added section "Command-Line Abbreviations." - Added section "Keyword Argument into," showing how to: - Collect options. - Check for missing options. - Provide option defaults. https://github.com/ruby/optparse/commit/39d39676c4 2021-04-10 17:30:19 -04:00			`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 = {yyy: 'AAA', zzz: 'BBB'}`
			`parser.parse!(into: options)`
			`p options`