Get or set nested constant

nested_const.rb

#!/usr/bin/ruby

class Object
  # copied from http://blog.udzura.jp/2010/03/08/petit-hacking-about-const_get/
  def self.nested_const_get(name)
    stack = (name.is_a?(Array))  ? name : name.to_s.split("::")
    klass = Object
    while const = stack.shift
      klass = klass.const_get(const)
    end
    return klass
  end

  def self.nested_const_set(args = {})
    args.each do |name, value|
      stack = (name.is_a?(Array)) ? name : name.to_s.split("::")
      last_const = stack.pop

      klass = nested_const_get(stack)
      klass.const_set(last_const, value)
    end
  end
end