checks if a Twoffein3 API key is valid

checkapikey.cs

using System;
using System.Text.RegularExpressions;

namespace Twoffein
{
    class Helpers
    {
        public static bool checkApiKey (string apiKey)
        {
            Regex r = new Regex (@"^[A-GI-MP-RT-VX-Z]{3}\d{2}[A-GI-MP-RT-VX-Z]{7}\d{2}[A-GI-MP-RT-VX-Z]{2}$");
            return r.IsMatch(apiKey);
        }
    }
}

checkapikey.js

var checkApiKey = function(apiKey) {
    return /^[A-GI-MP-RT-VX-Z]{3}\d{2}[A-GI-MP-RT-VX-Z]{7}\d{2}[A-GI-MP-RT-VX-Z]{2}$/.test(apiKey);
};

checkapikey.rb

#!/usr/bin/env ruby

##
# Returns true if `api_key` is a valid Twoffein3 API key
def check_api_key(api_key)
  !/^[A-GI-MP-RT-VX-Z]{3}\d{2}[A-GI-MP-RT-VX-Z]{7}\d{2}[A-GI-MP-RT-VX-Z]{2}$/.match(api_key).nil?
end

puts check_api_key ARGV[0]