Enumerator as an infinite generator in Ruby

Question

I\'m reading one resource explaining how Enumerators can be used as generators, which as an example like:

triangular_numbers = Enumerator.new do |yielder|
  numb         


        

Answer 1

I found a nice concise answer in Ruby Cookbook:

https://books.google.com/books?id=xBmkBwAAQBAJ&pg=PT463&lpg=PT463&dq=upgrade+ruby+1.8+generator&source=bl&ots=yyVBoNUhNj&sig=iYXXR_8QqVMasFnS53sbUzGAbTc&hl=en&sa=X&ei=fOM-VZb0BoXSsAWulIGIAw&ved=0CFcQ6AEwBw#v=onepage&q=upgrade%20ruby%201.8%20generator&f=false

This shows how to make a Ruby 1.8 style Generator using the Ruby 2.0+ Enumerator class.

my_array = ['v1', 'v2']

my_generator = Enumerator.new do |yielder|
    index = 0
    loop do
        yielder.yield(my_array[index])
        index += 1
    end
end

my_generator.next    # => 'v1'
my_generator.next    # => 'v2'
my_generator.next    # => nil