Javascript interview questions and answers #shorts #react #javascript #interview

[krishnanspace]

My solution was to declare the array outside the function. lol. But your solution is great too

[truthShallPrevailRRVS]

For others saying create an array outside
That's not a perfect solution because that array is accessible everywhere because it's in global scope
Whereas with closure that array will only be accessible to the child function
A closure is a function that creates its own scope and returns another function along with that scope

[trongquocnguyen]

Thanks for sharing
Why dont just return 0 so no array would be created😂

[jatthundeaaaaa]

Amazing
I know about closures but not about use cases like this

[animuspexus]

var newArray = null;

function expensiveFunction(index) {
if (newArray == null) {
newArray = new Array(100).fill('0');
}
return newArray[index];
}

[BhideSvelte]

i think u yourself making it confusing just simply define it outside..the fuction ...it would be more predictable