Hands-On Functional Programming with TypeScript

Delegating to another generator (yield*)

We can use the yield* expression to delegate from one generator to another. The following code snippet defines two generator functions, named g1 and g2. The g2 generator uses the yield* expression to delegate the iteration to the iterator created by g1:

function* g1() {    yield 2;    yield 3;    yield 4;}function* g2() {    yield 1;    yield* g1();    yield 5;}var iterator1 = g2();console.log(iterator1.next()); // {value: 1, done: false}console.log(iterator1.next()); // {value: 2, done: false}console.log(iterator1.next()); // {value: 3, done: false}console.log(iterator1.next()); // {value: 4, done: false}console.log(iterator1.next()); // {value: 5, done: false}console.log(iterator1.next()); // {value: undefined, done: ...