Quickly add friends to an email list you'll set up some day.

email_list.rb

#!/usr/bin/env ruby
require 'rubygems'
require 'yaml'

# Add users quickly from command line to email_list.txt
# usage is:
# $ ruby email_list.rb [name] [email]

name, email = ARGV
file_name = 'email_list.txt'

if name and email
  list = YAML.load(File.read(file_name)) || []
  list << {:name => name, :email=> email}
  
  file = File.open(file_name, 'w+')
  file.write(list.to_yaml)
  file.close
  
  puts "You have #{list.size} people waiting for your awesome project!"
end