OptionParser order of arguments

ruby-talk
1

all-

i've had a lot of success working with OptionParser, but there is one burr in the saddle- order of arguments parsed. sample code:

require 'optparse'
class MyClass
   def initialize(arguments)
     @options = {}
     opts = OptionParser.new
     opts.on('--some-param [PARAM]') {|param| @options[:param] = param}
     opts.on('--print-param') { puts @options[:param]}
     opts.parse!
   end
end
MyClass.new(ARGV)

put that in a file (opt_test.rb) and run the following:

ruby opt_test.rb --print-param --some-param tom
$ nil
ruby opt_test.rb --some-param tom --print-param
$ tom

obviously, it works as intended, but it does require that one pass arguments in a particular order. anyone know of a way around this?

thanks all,
tom

2

Hi,

At Tue, 15 Jan 2008 15:09:58 +0900,
Tom Metge wrote in [ruby-talk:287471]:

require 'optparse'
class MyClass
   def initialize(arguments)
     @options = {}

       print_param = false

     opts = OptionParser.new
     opts.on('--some-param [PARAM]') {|param| @options[:param] = param}

       opts.on('--print-param') { print_param = true }

     opts.parse!

       puts @options[:param] if print_param

···

   end
end
MyClass.new(ARGV)

--
Nobu Nakada