ARGV/OptionParser destruction

argv.rb

require 'optparse'
require 'ostruct'

options = OpenStruct.new
parser = OptionParser.new do |opts|
  opts.on("-f", "--force", "Force something to happen") do |force|
    options.force = force
  end
end

# let's see what ARGV is before it's parsed
puts ARGV.inspect

# by default, OptionParser consumes the argument (default ARGV), so
# dup it before parsing will preserve ARGV.
argv_copy = ARGV.dup
parser.parse!(argv_copy)
puts options.inspect

# look... ARGV is preserved, while argv_copy is consumed.
puts ARGV.inspect
puts argv_copy.inspect

# run with:
# ruby argv.rb -f