function_builder.rb

require 'rest_client'

module HTTPFunc
  def self.get(url=nil, error_callback=nil, &success_callback)
    return ->() {
      begin
        response = RestClient.get url
        if success_callback
          success_callback.(response)
        else
          response
        end
      rescue
       error_callback.() if error_callback
      end
    }
  end

  def self.post(url=nil, data=nil, error_callback=nil, &success_callback)
    return ->() {
      begin
        response = RestClient.post url, data
        if success_callback
          success_callback.(response)
        else
          response
        end
      rescue
       error_callback.() if error_callback
      end
    }
  end
end

websites_functions = []
google = HTTPFunc.get("http://www.google.com") do |response|
  puts "LOADED #{response.length} characters from goog"
end
  
websites_functions << google

yc = HTTPFunc.get("http://news.ycombinator.com") do |response|
  puts "LOADED #{response.length} characters from yc"
end
websites_functions << yc

websites_functions.each do |website_func|
  website_func.()
end