iterators in javascript

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Eric
30 Jul 2018
1//Iterators
2function fruitsIterator(array) {
3  let nextIndex = 0;
4  //fruitsIterator will return an object
5  return {
6    next: function () {
7      if (nextIndex < array.length) {
8        //next function will return the below object
9        return {
10          value: array[nextIndex++],
11          done: false,
12        };
13      } else {
14        return { done: true };
15      }
16    },
17  };
18}
19let myArr = ["apple", "banana", "orange", "grapes"];
20console.log("My array is", myArr);
21
22//using the iterator 
23const fruits=fruitsIterator(myArr);
24console.log(fruits.next()); //apple
25console.log(fruits.next());//banana
26console.log(fruits.next());//grapes 
27
Silvana
09 Sep 2017
1The iterator is an object that returns values via its method next()
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