tomajask

# app/controllers/application_controller.rb
class ApplicationController < ActionController::Base
  def append_info_to_payload(payload)
    super
    payload[:remote_ip] = request.remote_ip
  end
end

# config/environments/<your env>.rb
Rails.application.configure do

tomajask

fields = %w(foo bar baz)
fields.each_with_object({}) do |field, memo|
  memo[field] = rand(1000)
end

tomajask

float = 123.45678
"%.4f" % float
# => "123.4568"

# or you can write it in a little bit different way

sprintf "%.4f", float
# => "123.4568"