---
title: Falsy Bouncer
---
# Falsy Bouncer
---
## Problem Explanation
Remove all falsy values from an array.
#### Relevant Links
* Falsy Values
---
## Hints
### Hint 1
Falsy is something which evaluates to FALSE. There are only six falsy values in JavaScript: undefined, null, NaN, 0, "" (empty string), and false of course.
### Hint 2
We need to make sure we have all the falsy values to compare, we can know it, maybe with a function with all the falsy values...
### Hint 3
Then we need to add a `filter()` with the falsy values function...
---
## Solutions
Solution 1 (Click to Show/Hide)
```js
function bouncer(arr) {
let newArray = [];
for (var i = 0; i < arr.length; i++) {
if (arr[i]) newArray.push(arr[i]);
}
return newArray;
}
```
#### Code Explanation
* We create a new empty array.
* We use a for cycle to iterate over all elements of the provided array (arr).
* We use the if statement to check if the current element is truthy or falsy.
* If the element is truthy, we push it to the new array (newArray). This result in the new array (newArray) containing only truthy elements.
* We return the new array (newArray).
#### Relevant Links
* [Boolean](https://forum.freecodecamp.com/t/javascript-boolean/14311)
* [Truthy value](https://forum.freecodecamp.com/t/javascript-truthy-value/15975)
* [Falsey values](https://www.freecodecamp.org/forum/t/javascript-falsy-values/14664)
* [Array.prototype.push](https://www.freecodecamp.org/forum/t/javascript-array-prototype-push/14298)
Solution 2 (Click to Show/Hide)
```js
function bouncer(arr) {
return arr.filter(Boolean);
}
```
#### Code Explanation
* The `Array.prototype.filter` method expects a function that returns a `Boolean` value which takes a single argument and returns `true` for truthy value or `false` for falsy value. Hence we pass the built-in `Boolean` function.
#### Relevant Links
* Boolean
* Truthy
* Array.prototype.filter()