yet another fail

require 'net/http'require 'json'start_url = "https://url-to-json.feed"posts = []loop do  body = JSON.parse(Net::HTTP.get(URI(start_url)))  next_page = body["paging"]["next"]  body["data"].each do |new_post|     id_exists = posts.detect {|post| post["id"] == new_post["id"] }    unless id_exists      posts << new_post    end  end  url = next_page  if posts.count > 199     break  endend