Get Twitter List members

gistfile1.rb

require 'open-uri'
require 'json'

user, list = ARGV[0].split('/')

abort "Usage: #$0 user/list" unless user && list

response = open("https://api.twitter.com/1/lists/members.json?slug=#{list}&owner_screen_name=#{user}&cursor=-1")

puts JSON.parse(response.read)['users'].map { |u| u['screen_name'] }