Why should I use a generator function?
Ok so I started looking at these fancy new generator functions. They seem cool, I guess, but my big challenge is understanding WHY. Everything I've heard is that generators help with async code, but I guess I'm having a hard time seeing where a generator would be better than just using a promise or async/await. Could someone give me some suggestions.
Generator functions are more closely related to for loops than async.
Key difference is the yield keyword.
This is like a bookmark, returning the value from the function, then resuming from that point when called again.
Heres an (untested) example. Notice how our iterator is potentially infinite?
function* RandomGenerator(from, toInclusive) {
const range = toInclusive - from;
while(true) {
yield from + (random() % range);
}
}const randoms = RandomGenerator(1, 10);for(var random of randoms) {
console.log(random);
if(random === 5) break;
}