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---
id: ab306dbdcc907c7ddfc30830
title: Steamroller
isRequired: true
challengeType: 5
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videoUrl: ''
localeTitle: Apisonadora
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---
## Description
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< section id = "description" > Aplanar una matriz anidada. Debe tener en cuenta los diferentes niveles de anidación. 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 > steamrollArray([[[" a" ]], [[" b" ]]])</ code > debe devolver < code > [" a" , " b" ]</ code > .'
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testString: 'assert.deepEqual(steamrollArray([[["a"]], [["b"]]]), ["a", "b"], "< code > steamrollArray([[["a"]], [["b"]]])< / code > should return < code > ["a", "b"]< / code > .");'
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- text: '< code > steamrollArray([1, [2], [3, [[4]]]])</ code > debe devolver < code > [1, 2, 3, 4]</ code > .'
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testString: 'assert.deepEqual(steamrollArray([1, [2], [3, [[4]]]]), [1, 2, 3, 4], "< code > steamrollArray([1, [2], [3, [[4]]]])< / code > should return < code > [1, 2, 3, 4]< / code > .");'
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- text: '< code > steamrollArray([1, [], [3, [[4]]]])</ code > debe devolver < code > [1, 3, 4]</ code > .'
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testString: 'assert.deepEqual(steamrollArray([1, [], [3, [[4]]]]), [1, 3, 4], "< code > steamrollArray([1, [], [3, [[4]]]])< / code > should return < code > [1, 3, 4]< / code > .");'
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- text: '< code > steamrollArray([1, {}, [3, [[4]]]])</ code > debe devolver < code > [1, {}, 3, 4]</ code > .'
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testString: 'assert.deepEqual(steamrollArray([1, {}, [3, [[4]]]]), [1, {}, 3, 4], "< code > steamrollArray([1, {}, [3, [[4]]]])< / code > should return < code > [1, {}, 3, 4]< / code > .");'
```
< / section >
## Challenge Seed
< section id = 'challengeSeed' >
< div id = 'js-seed' >
```js
function steamrollArray(arr) {
// I'm a steamroller, baby
return arr;
}
steamrollArray([1, [2], [3, [[4]]]]);
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```
< / div >
< / section >
## Solution
< section id = 'solution' >
```js
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// solution required
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```
< / section >