Yield all values from another iterator

Question

Does Ruby provide any mechanism to allow an iterator to yield all values from another iterator? (or "subiterator", I'm not sure what the proper name is). Similar to Python3.3+'s yield from

def f
    yield 'a'
    yield 'b'
end

def g
   # yield everything from f
   yield 'c'
   yield 'd'
end

Answer 1

This is probably the most idiomatic approach:

def f
  yield 'a'
  yield 'b'
end

def g(&block)
  f(&block)
  yield 'c'
  yield 'd'
end