remove trailing elements from array that are equal to zero - better way

Question

I have very long array containing numbers. I need to remove trailing zeros from that array.

if my array will look like this:

var arr = [1,2,0,1,0,1,0         


        

Answer 1

Assuming:

var arr = [1,2,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0];

You can use this shorter code:

while(arr[arr.length-1] === 0){ // While the last element is a 0,
    arr.pop();                  // Remove that last element
}

Result:

arr == [1,2,0,1,0,1]