Export IDs of the people you're following on Twitter.

save-followings.rb

#!/usr/bin/env ruby
require 'rubygems'
require 'twitter'
require 'json'
require 'faraday'

TWITTER_USER = "blahblah"

# get these from dev.twitter.com
CONSUMER_KEY = "blahblah"
CONSUMER_SECRET = "blahblah"
OAUTH_TOKEN = "blahblah"
OAUTH_TOKEN_SECRET = "blahblah"

Twitter.configure do |config|
  config.consumer_key = CONSUMER_KEY
  config.consumer_secret = CONSUMER_SECRET
  config.oauth_token = OAUTH_TOKEN
  config.oauth_token_secret = OAUTH_TOKEN_SECRET
end

cursor = -1
followings = Twitter.friend_ids(TWITTER_USER,{:cursor=>cursor})

File.open("followings-#{Time.now.to_s.gsub(" ","_")}.txt", 'w') do |f|
  f.write followings.ids.to_s
end

puts "ok! saved #{followings.ids.length} followings to file in this directory."