Passing commandline parameter (arguments) to ruby file using optparser

Passing parameters

ruby input.rb TOI DH TimesNew

Accessing parameters

 # input.rb
 p ARGV
 # => ["TOI", "DH", "TimesNew"]
 p ARGV[0]
 # => "TOI"
 p ARGV[1]
 # => "DH"

Optparser : parses commandline options in more effective way using OptParser class.and we can access options as hashed parameters.

Passing parameters

ruby input.rb -P"The Times of India" --category"article"

Accessing parameters

 
 # input.rb
 require 'optparser'
 
 options = ARGV.getopts("P:", 'category')

 p options
 # => { 'P' => 'The Times of India', :category => 'article' }

 p options['P']
 # => "The Times of India"