method_lookup.rb

class Module
  # Inspect the method lookup process like you can in JS.Class
  # http://jsclass.jcoglan.com/reflection.html
  # 
  #     Array.lookup :any?
  #     #=> [#<UnboundMethod: Enumerable#any?>]
  #     
  #     class Array; def any?; super; end; end
  #     Array.lookup :any?
  #     #=> [#<UnboundMethod: Array#any?>, #<UnboundMethod: Enumerable#any?>]
  # 
  def lookup(name)
    name = name.to_sym
    ancestors.map { |mod|
      mod.instance_methods(false).map { |method_name|
        method_name.to_sym
      }.include?(name) ?
          mod.instance_method(name) :
          nil
    }.compact
  end
end