Array is not changed after filter on javascript

Question

I'm trying yo filter the numeric values of an array with this code:

 function getNumerics(toFilter) {
        toFilter = toFilter.filter( element =>  !isNaN(element));
        console.log(toFilter);
      }
      
      var toFilter = [1, 'z', '4', 2, 6];
      getNumerics(toFilter);
      console.log(toFilter);

The console.log inside the function shows a correct result but but the last console.log show the array with all the values but if I pass the array to the function why is not change? in javascript all parameters are passed are reference , aren't it?

Do you expect `"4"` to be returned or filtered out? – Roko C. Buljan Dec 04 '22 at 18:07 — Roko C. Buljan, Dec 04 '22 at 18:07

score 0 · Answer 1 · edited Dec 04 '22 at 18:05

0

Your function should return the filtered Array:

function getNumerics(toFilter) {
  return toFilter.filter( element =>  !isNaN(element));
}
      
var toFilter = [1, 'z', '4', 2, 6];
toFilter = getNumerics(toFilter);
console.log(toFilter);

edited Dec 04 '22 at 18:05

Roko C. Buljan

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answered Dec 04 '22 at 18:03

andrii

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Please avoid answers like *"Try this:"* or *"This should work:"*. Also I would add a wise suggestion to not mutate the input Array. But to create a new one instead. – Roko C. Buljan Dec 04 '22 at 18:06

Array is not changed after filter on javascript

1 Answers1