Is there a better way to iterate over the results of a generator, my for loop is ugly:
for(let job = readyJob.next(); !job.done; job = readyJob.next()){ }
<
for ... of
is the elegant solution but not overall supported, however while (!(next = cursor.next()).done) {
is a very cryptic, and one might ask himself, how come (var x = someFunctionCall())
is evaluated to true
and
another would answer welcome to javascript
.
For that reason and to and give the answer another shape, it can also be done using a recursive function.
function loopThose(items) {
const item = items.next();
// doStuff(item);
if (!item.done) {
loopThose(items);
}
}
A true benefit is when async, try catch and custom continue condition come into play:
async function printKeys(items) {
try {
const item = await items.next();
// doStuff(item);
if (isConditionFulfil(item)) {
await this.printKeys(items);
}
} catch (e){
}
}
Where a generator function yields promises that might fail:
function * list(){
for (var i = 0; i<10; i++){
yield fetch(buildResourceUrl(i)).then(res => res.json())
}
}