zork/generators.js

function* aa () {
    yield 1
    yield 2
    yield 3
    return 44
}

function* bb () {
    console.log('yield* aa()', yield* aa())
}
function* generateNumbers(start, step, end) {
    for (let i = start; i < end; i += step) {
        console.log(yield i)
    }
}