There are other details that are wrong. Ruby does have iterators — except they're called enumerators. The standard implementation is called Enumerator: >>

There are other details that are wrong. Ruby does have iterators — except they're called enumerators. The standard implementation is called Enumerator: >> [1, 2, 3].each => #<Enumerator: [1, 2, 3]:each> >> e = [1, 2, 3].each => #<Enumerator: [1, 2, 3]:each> >> e.next => 1 >> e.next => 2 >> e.next => 3 >> e.next Traceback (most recent call last): 2: from (irb):17 1: from (irb):17:in `next' StopIteration (iteration reached an end) Enumerators behave similarly to generators in Python thanks to utilities like #to_enum: class X def each yield 1 yield 2 yield 3 end end >> x = X.new.to_enum >> x.each #<Enumerator: #<X:0x00007fd30c93dfa0>:each> >> x.next 1 [etc.] Ruby's for loops actually use enumerators, just like Python. It's just not used as much, for cultural reasons; most devs these days favour Ruby's data-oriented inversion of control.