Function makeIterator(array) { var nextIndex = 0;

Question

Function makeIterator(array) { var nextIndex = 0;

return {
next: function() {
return nextIndex < array.length ?
{value: array[nextIndex++], done: false} :
{done: true};
}
};
}
var it = makeIterator(['yo', 'ya']);
console.log(it.next()); // 'yo'
console.log(it.next()); // 'ya'
console.log(it.next()); // true

Could somebody explain me how the makeIterator function know what was it's last index?

0

31.10.2019

1 ответов

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Thomas · Accepted Answer

Thomas

makeIterator runs: * defines nextIndex every time next runs: * increments nextIndex

0

31.10.2019

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