72 lines
4.6 KiB
Markdown
72 lines
4.6 KiB
Markdown
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---
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title: Falsy Bouncer
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---
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 Remember to use <a>**`Read-Search-Ask`**</a> if you get stuck. Try to pair program  and write your own code 
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###  Problem Explanation:
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Remove all <a href='https://guide.freecodecamp.org/javascript/falsy-values/' target='_blank' rel='nofollow'>falsy</a> values from an array.
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#### Relevant Links
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* <a href='https://guide.freecodecamp.org/javascript/falsy-values/' target='_blank' rel='nofollow'>Falsy Values</a>
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##  Hint: 1
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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.
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> _try to solve the problem now_
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##  Hint: 2
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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...
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> _try to solve the problem now_
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##  Hint: 3
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Then we need to add a `filter()` with the falsy values function...
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> _try to solve the problem now_
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## Spoiler Alert!
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**Solution ahead!**
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##  Advanced Code Solution:
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function bouncer(arr) {
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return arr.filter(Boolean);
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}
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 <a href='https://repl.it/CLjU/32' target='_blank' rel='nofollow'>Run Code</a>
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### Code Explanation:
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The `Array.prototype.filter` method expects a function that returns a `Boolean` value which takes a single argument and returns `true` for <a href='http://forum.freecodecamp.com/t/javascript-truthy-value/15975' target='_blank' rel='nofollow'>truthy</a> value or `false` for <a href='https://guide.freecodecamp.org/javascript/falsy-values/' target='_blank' rel='nofollow'>falsy</a> value. Hence we pass the built-in `Boolean` function.
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#### Relevant Links
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* <a href='http://forum.freecodecamp.com/t/javascript-boolean/14311' target='_blank' rel='nofollow'>Boolean</a>
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* <a href='http://forum.freecodecamp.com/t/javascript-truthy-value/15975' target='_blank' rel='nofollow'>Truthy</a>
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* <a href='http://forum.freecodecamp.com/t/javascript-array-prototype-filter/14289' target='_blank' rel='nofollow'>Array.prototype.filter()</a>
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##  Credits:
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If you found this page useful, you can give thanks by copying and pasting this on the main chat:
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**`Thanks @renelis @abhisekp @Rafase282 for your help with Algorithm: Falsy Bouncer`**
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##  NOTES FOR CONTRIBUTIONS:
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*  **DO NOT** add solutions that are similar to any existing solutions. If you think it is **_similar but better_**, then try to merge (or replace) the existing similar solution.
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* Add an explanation of your solution.
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* Categorize the solution in one of the following categories — **Basic**, **Intermediate** and **Advanced**. 
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* Please add your username only if you have added any **relevant main contents**. ( **_DO NOT_** _remove any existing usernames_)
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> See  <a href='http://forum.freecodecamp.com/t/algorithm-article-template/14272' target='_blank' rel='nofollow'>**`Wiki Challenge Solution Template`**</a> for reference.
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