Simple JS Iterator

SimpleIterator.js

 
function createIterator(items) {
    var currentIndex = 0;
    
    return {
        next: function() {
            if (items[currentIndex]) {
                return { value: items[currentIndex], done: false };
            } else {
                return { value: undefined, done: true };
            }
            
            currentIndex++;
        }
    }
}
 
// Usage
var iter = createIterator([1, 2, 3]);
 
console.log(iter.next());
console.log(iter.next());
console.log(iter.next());
console.log(iter.next());