Implement a Falsy Remover - Implement a Falsy Remover

JavaScript
1

Tell us what’s happening:

Hey, my code does not pass test -
6. The bouncer function should not mutate the array passed in as argument.
But it works fine on the console.

Your code so far

function bouncer(arr) {
  let result = [];

  for(let i = 0; i < arr.length; i++) {
    let ifFalse = arr[i] === 0 ||
      arr[i] === false
      || arr[i] === null
      || arr[i] === ""
      || arr[i] === undefined
      || Number.isNaN(arr[i]);

    if(ifFalse) {
        delete arr[i];
      } else {
        result.push(arr[i]);
      }

  }
  return result;
}

const testArr = bouncer(["I like pauline", 25, NaN, true, false, "", null, undefined]);
console.log(testArr);

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36

Challenge Information:

Implement a Falsy Remover - Implement a Falsy Remover

2

What does it mean by “should not mutate the array passed in as argument” ?

3

I know it against me using the “delete” but how else I’m I to make it work if not

4

Can you please explain what that line of code does? (or more importantly, why)

5

you are doing this, aren’t you? why you need to delete the others?