freeCodeCamp/curriculum/challenges/spanish/02-javascript-algorithms-an.../basic-algorithm-scripting/finders-keepers.spanish.md

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---
id: a6e40f1041b06c996f7b2406
title: Finders Keepers
isRequired: true
challengeType: 5
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videoUrl: ''
localeTitle: Buscadores guardianes
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---
## Description
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<section id="description"> Cree una función que examine una matriz (primer argumento) y devuelva el primer elemento de la matriz que pase una prueba de verdad (segundo argumento). Si ningún elemento pasa la prueba, devuelva indefinido. Recuerda usar <a href="http://forum.freecodecamp.org/t/how-to-get-help-when-you-are-stuck/19514" target="_blank">Read-Search-Ask</a> si te atascas. Trate de emparejar el programa. Escribe tu propio código. </section>
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## Instructions
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<section id="instructions">
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</section>
## Tests
<section id='tests'>
```yml
tests:
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- text: '<code>findElement([1, 3, 5, 8, 9, 10], function(num) { return num % 2 === 0; })</code> debe devolver 8.'
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testString: 'assert.strictEqual(findElement([1, 3, 5, 8, 9, 10], function(num) { return num % 2 === 0; }), 8, "<code>findElement([1, 3, 5, 8, 9, 10], function(num) { return num % 2 === 0; })</code> should return 8.");'
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- text: '<code>findElement([1, 3, 5, 9], function(num) { return num % 2 === 0; })</code> debe devolver undefined.'
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testString: 'assert.strictEqual(findElement([1, 3, 5, 9], function(num) { return num % 2 === 0; }), undefined, "<code>findElement([1, 3, 5, 9], function(num) { return num % 2 === 0; })</code> should return undefined.");'
```
</section>
## Challenge Seed
<section id='challengeSeed'>
<div id='js-seed'>
```js
function findElement(arr, func) {
let num = 0;
return num;
}
findElement([1, 2, 3, 4], num => num % 2 === 0);
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```
</div>
</section>
## Solution
<section id='solution'>
```js
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// solution required
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```
</section>