Does Hash override Enumerable#map()?

Question

Given that map() is defined by Enumerable, how can Hash#map yield two variables to its block? Does Hash override Enumerable#map()?

Here's a little example, for fun:

ruby-1.9.2-p180 :001 > {"herp" => "derp"}.map{|k,v| k+v}
 => ["herpderp"] 

Answer 1

It doesn't override map

Hash.new.method(:map).owner # => Enumerable

It yields two variables which get collected into an array

class Nums
  include Enumerable

  def each
    yield 1
    yield 1, 2
    yield 3, 4, 5
  end
end

Nums.new.to_a # => [1, [1, 2], [3, 4, 5]]