From: Neubyr Neubyr <lists@...>
Date: 2012-07-04T07:07:20+09:00
Subject: passing ARGV to class methods

I have been writing command-line programs using a pattern similar to
described here - http://blog.toddwerth.com/entries/5 . Below is a quick
and dirty code snippet based on this pattern.


#!/usr/bin/env ruby

require 'ostruct'
require 'optparse'
class MyPrinter

def initialize(arguments)
  @arguments = arguments
  # Set defaults
  @options = OpenStruct.new
end

def parse_options
  opts_obj = OptionParser.new do |opts|
    opts.on('-h', '--help') { @options.help = true }
  end
  opts_obj.parse!(@arguments)
end

def process_options
  output_help if @options.help
end

def output_help
  puts 'Use Google!'
end

def run
    parse_options
    process_options
end

end

p = MyPrinter.new(ARGV)
p.run



I was wondering if I really need to pass ARGV to MyPrinter's initialize
method. The ARGV is anyway available to the class so  I think it doesn't
need to be passed and can be used directly during option parsing step -
'opts_obj.parse!(ARGV)' .  But I am not sure if it's a good practice or
not. Any tips?

-
thanks,
neubyr

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