Intermediate
JavaScript
Q87 / 100
What is the iterator helpers proposal (Stage 3) in JavaScript?
Correct! Well done.
Incorrect.
The correct answer is B) Built-in map, filter, take, drop, and other lazy methods directly on iterators via Iterator.prototype
B
Correct Answer
Built-in map, filter, take, drop, and other lazy methods directly on iterators via Iterator.prototype
Explanation
function* gen() { yield* [1,2,3,4,5]; } gen().filter(x => x > 2).take(2).toArray() — lazy iterator operations without materializing to array first.
Progress
87/100