iTunes top 100 list...

itunes.rb

require 'open-uri'
require 'json'

region = "us"
category = "newapplications"

if !ARGV[0].nil?
        region = ARGV[0]
end

if !ARGV[1].nil?
        category = ARGV[1]
end

base_url = "https://itunes.apple.com/" + region + "/rss/" + category + "/limit=10/json"

json = open(URI.parse(base_url)).read

data = JSON.parse(json)
ct = 0

data['feed']['entry'].each do |entry|
        ct += 1
        bid = entry['id']['attributes']['im:bundleId']
        if !bid.nil?
                puts ct.to_s + ". " + bid
        else
                puts ct.to_s + ". " + "No Bundle ID"
        end
end