freeCodeCamp/curriculum/challenges/spanish/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/steamroller.spanish.md

id, title, localeTitle, isRequired, challengeType

id	title	localeTitle	isRequired	challengeType
ab306dbdcc907c7ddfc30830	Steamroller	Apisonadora	true	5

Description

Aplanar una matriz anidada. Debe tener en cuenta los diferentes niveles de anidación. Recuerda usar Read-Search-Ask si te atascas. Trate de emparejar el programa. Escribe tu propio código.

Instructions

Tests

tests:
  - text: ' <code>steamrollArray([[[&quot;a&quot;]], [[&quot;b&quot;]]])</code> debe devolver <code>[&quot;a&quot;, &quot;b&quot;]</code> .'
    testString: 'assert.deepEqual(steamrollArray([[["a"]], [["b"]]]), ["a", "b"], "<code>steamrollArray([[["a"]], [["b"]]])</code> should return <code>["a", "b"]</code>.");'
  - text: ' <code>steamrollArray([1, [2], [3, [[4]]]])</code> debe devolver <code>[1, 2, 3, 4]</code> .'
    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>.");'
  - text: ' <code>steamrollArray([1, [], [3, [[4]]]])</code> debe devolver <code>[1, 3, 4]</code> .'
    testString: 'assert.deepEqual(steamrollArray([1, [], [3, [[4]]]]), [1, 3, 4], "<code>steamrollArray([1, [], [3, [[4]]]])</code> should return <code>[1, 3, 4]</code>.");'
  - text: ' <code>steamrollArray([1, {}, [3, [[4]]]])</code> debe devolver <code>[1, {}, 3, 4]</code> .'
    testString: 'assert.deepEqual(steamrollArray([1, {}, [3, [[4]]]]), [1, {}, 3, 4], "<code>steamrollArray([1, {}, [3, [[4]]]])</code> should return <code>[1, {}, 3, 4]</code>.");'

Challenge Seed

function steamrollArray(arr) {
  // I'm a steamroller, baby
  return arr;
}

steamrollArray([1, [2], [3, [[4]]]]);

Solution

function steamrollArray(arr) {
  if (!Array.isArray(arr)) {
    return [arr];
  }
  var out = [];
  arr.forEach(function(e) {
    steamrollArray(e).forEach(function(v) {
      out.push(v);
    });
  });
  return out;
}