Easily load config files in Rails 4.2

rails_4_2-config_for.rb

# "Easily load config files
#  OK, I might be biased. But having a built-in way to load config files is going to be awesome.
#  config_for, new in Rails 4.2, works exactly like you’d expect:"
# http://www.justinweiss.com/articles/the-lesser-known-features-in-rails-4-dot-2/

Rails.application.config_for(:database)
# => {"adapter"=>"mysql2", "encoding"=>"utf8", "database"=>"development_db", "username"=>"root", "password"=>nil, "host"=>"localhost", "pool"=>5, "socket"=>"/tmp/mysql.sock"}