Javascript Concept

IteratorInJavascript.js

const test = [1, 2, 3];
for(const t of test){
    t
}
console.log(test);

const iterator = test[Symbol.iterator]()
iterator
console.log(iterator.next());
console.log(iterator.next());
console.log(iterator.next());
console.log(iterator.next());

// Custom Object that have iterator

const makeCustomObjectWithIterator = (count) => {
    return {
        [Symbol.iterator]: () => {
            let ctr = 0;
            return {
            next: () => {
                ctr++;
                if(ctr <= count){
                    return { value: Math.round(Math.random() * 10) , done: false }
                }
                return { done: true }
            }
            }
        }
    }
}

const aIterable = makeCustomObjectWithIterator(5);

for(const i of aIterable){
    i
}

const bIterable = makeCustomObjectWithIterator(10);

for(const i of bIterable){
    i
}


// Iterator can be asyncronus that is fetch data from an API

// And Generator in javascript is just a syntax sugar over it.