Ruby Command-Line Arguments

Posted on September 20, 2008 by Ashiq Alibhai

If you’re writing a serious Ruby application (not a Rails application necessarily), this question may apply to you: how do you access command-line arguments in Ruby?

Ruby provides an array called ARGV (all upper-case). This array contains all the command-line arguments; so if you run this:

ruby script.rb first second third

… then ARGV.length is 3, ARGV[0] is “first”, ARGV[1] is second, and ARGV[2] is third.

About Ashiq Alibhai

Ashiq Alibhai, PMP, has been a Rails aficionado since 2007, and developed web applications since early 2003, where he learned PHP in one summer. As the driving-force behind RailsRocket and the Launchpad project, he seeks to share the ease of development with Rails far and wide.
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One Response to Ruby Command-Line Arguments

  1. deli says:
    May 18, 2009 at 9:59 am

    thx to write this.