Can I yield from an inner function?

Question

With ES6 generators, I see code like this:

var trivialGenerator = function *(array) {
    var i,item;
    for(var i=0; i < array.length; i++){
        item = array[i];
        yield item;
    };
};

Is it possible to write something more like the code below instead?

var trivialGenerator = function *(array) {
    array.forEach(function *(item){
        yield item;
    });
};

Answer 1

No, you can't use yield inside of the inner function. But in your case you don't need it. You can always use for-of loop instead of forEach method. It will look much prettier, and you can use continue, break, yield inside it:

var trivialGenerator = function *(array) {
    for (var item of array) {
        // some item manipulation
        yield item;
    }
}

You can use for-of if you have some manipulations with item inside it. Otherwise you absolutely don't need to create this generator, as array has iterator interface natively.