From: dusty <dusty.doris@...>
Date: 2008-07-03T12:03:37+09:00
Subject: Re: Lost with OptionParser

Here is a quick example program.  Hope this gets you started.

#!/usr/bin/env ruby
require 'optparse'

options = {}
opts = OptionParser.new
opts.on("-W", "--weekday", "Print out the weekday") do |v|
  options[:weekday] = true
end
opts.on("-H", "--hour TYPE", "Print out the hour in 24 or 12 hour
clock") do |v|
  options[:hour] = v
end

opts.parse!

unless options[:weekday] || options[:hour]
  puts opts
  exit
end

if options[:weekday]
  puts Time.now.strftime("%A")
  exit
end

case options[:hour]
  when "12"
    puts Time.now.strftime("%I")
  when "24"
    puts Time.now.strftime("%H")
  else
    puts "You must send 12 or 24 as an argument to --hour"
end