Repeat input message.

gistfile1.rb

require 'optparse'

# Init parameters.
# Refernce: optparse.rb
def init_params(args)

  # Parameters filter by OptionParser.
  params = {:repeat => 1, :input => 'N/A'}

  OptionParser.new do |opts|
    opts.banner = "Usage: #{$0} [options]"
    opts.on('-r', '--repeat [NUMBER]', 'repeat [NUMBER] times of input string') do |number|
      params[:repeat] = number.to_i || 1
    end

    opts.on('-i', '--input [STRING]', '[STRING] show on the screen') do |string|
      params[:input] = string || 'defualt message'
    end

    opts.on_tail('-h', '--help', 'display this help and exit') do
      puts opts
      exit
    end
  end.parse!(args)

  params
end

# Repeat input message.
def print(input, repeat)
  repeat.times{puts "#{input}"}
end

params = init_params(ARGV)
print(params[:input], params[:repeat])