each_with_index.map

each_with_index_test.rb

class EachWithIndexTest < Test::Unit::TestCase
  def setup
    @array = ["one", "two", "three"]
  end

  def test_each_with_index_enumerator
    enum = @array.each_with_index
    assert_equal ["one", 0], enum.next
  end

  def test_each_with_index_and_map
    @array.each_with_index.map do |item, index|
      assert_not_nil item
      assert_not_nil index
    end
  end
end