gistfile1.rb

require 'colored'

class RegExAvailableDomains
  
  def initialize(regex, show_output)
    @regex = regex
    @show_output = show_output
    @matching_words = []
    @available_domains = []
    find
  end
  
  def find
    File.open("/usr/share/dict/words") do |file|
      file.each do |line|
        begin
          word = line.strip
          if word.match(@regex)
            @matching_words << word
            dot_com = word[1..-1] + ".com"
            whois = `whois #{dot_com}`
            if whois.split("\n")[7].include?("No match for")
              @available_domains << dot_com
              puts dot_com.green if @show_output
            else
              puts dot_com.red if @show_output
            end
          end
        rescue
           puts "error with: " + word if @show_output
        end
      end
    end
    @available_domains
  end
  
end

RegExAvailableDomains.new(/^.ele.*/, true)