Implement a Falsy Remover - Implement a Falsy Remover

JavaScript
1

Tell us what’s happening:

I’ve got most of the tests passing, but I’m still stuck on test 2 and test 3.

Test 2: bouncer([7, “ate”, “”, false, 9]) should return [7, “ate”, 9], but my code only gives [7, 9].

Test 3: bouncer([“a”, “b”, “c”]) should return [“a”, “b”, “c”], but mine comes back as .

Not quite sure where I’m going wrong here — any tips?

Your code so far

let newArray = [];

const bouncer = (array) => {
  array.forEach((arrEl) => {
    if (
      arrEl !== false &&
      arrEl !== null &&
      arrEl !== 0 &&
      arrEl !== "" &&
      arrEl !== undefined &&
      !isNaN(arrEl)
    ) {
      newArray.push(arrEl);
    }
  });
  return newArray;
};

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:142.0) Gecko/20100101 Firefox/142.0

Challenge Information:

Implement a Falsy Remover - Implement a Falsy Remover
https://www.freecodecamp.org/learn/full-stack-developer/lab-falsy-remover/implement-a-falsy-remover

2

I worked on this one yesterday. I used the hint provided by freeCodeCamp to convert each value into a Boolean.

3

I’ve finally passed all the tests with your help. I hadn’t realised just how useful Boolean can be — that was a real eye-opener!

1 Like
4

you can also use the inherent truthyness or falsyness of any value here

5

Do you mean I can rely on JavaScript’s type coercion — where values are automatically treated as either truthy or falsy — instead of explicitly wrapping them in Boolean()?

Because both if (value) and if (Boolean(value)) work the same way.

6

yes, it’s rare you need to use Boolean specifically when you can do that

1 Like