Simple Enumerable extension to randomly stream elements.

random_stream.rb

module Enumerable
  def random_stream(&block)
    enumerator = Enumerator.new do |y|
      loop do
        y << sample
      end
    end
    
    block ? enumerator.each(&block) : enumerator
  end
end

binary = [0, 1]

stream = binary.random_stream

stream.take(10) #=> [1, 1, 1, 1, 1, 1, 0, 1, 0, 0]
stream.take(10) #=> [0, 0, 1, 0, 1, 1, 0, 0, 0, 0]

stream.next #=> 1
stream.next #=> 1
stream.next #=> 0

stream.peek #=> 1
stream.peek #=> 1
stream.peek #=> 1
# ..., always the same value

# loops infinitely:
binary.random_stream do |n|
  puts n
end