How do I implement a cycle-through array with a generator function
You need a loop in your generator code, otherwise there is only one yield happening:
function* stepGen(steps){ let index = 0; while (true) { yield steps[index]; index = (index+1)%steps.length; }}let gen = stepGen(['one', 'two', 'three']); // pass array to make it more reusableconsole.log(gen.next().value); console.log(gen.next().value);console.log(gen.next().value);console.log(gen.next().value);console.log(gen.next().value);Alternatively you can also use yield* which yields values from an iterable, one by one:
function* stepGen(steps){ while (true) yield* steps;}let gen = stepGen(['one', 'two', 'three']);console.log(gen.next().value); console.log(gen.next().value);console.log(gen.next().value);console.log(gen.next().value);console.log(gen.next().value);