Ruby’s yield

One of the great things in C# is yield return. It’s a form of continuation implemented atop the CLR in an ingeniously lightweight way, purely by transforming the body of an ordinary method into a state machine class.

JavaScript Generators

These work annoyingly well. Why annoying? Because they’re Mozilla specific. If only we could use them all the time. The other thing that’s annoying is how they are actually better than the C# equivalent.

There are two major advantages compared with C#’s yield return.