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interface IteratorInterface {
next: () => {
value: any
done: boolean
}
}
function createIterator(array: any[]): IteratorInterface {
let index = 0
let len = array.length
return {
next: function () {
return index < len ? { value: array[index++], done: false } : { value: undefined, done: true }
}
}
}
var iterator = createIterator([1, 2, 3])
console.log(iterator.next()) // { value: 1, done: false }
console.log(iterator.next()) // { value: 2, done: false }
console.log(iterator.next()) // { value: 3, done: false }
console.log(iterator.next()) // { value: undefined, done: true }
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