freeCodeCamp/curriculum/challenges/spanish/02-javascript-algorithms-and-data-structures/basic-javascript/manipulate-arrays-with-shift.spanish.md

id, title, localeTitle, challengeType

id	title	localeTitle	challengeType
56bbb991ad1ed5201cd392cd	Manipulate Arrays With shift()	Manipular matrices con cambio ()	1

Description

pop() siempre elimina el último elemento de una matriz. ¿Qué pasa si quieres eliminar el primero? Ahí es donde .shift() en .shift() . Funciona igual que .pop() , excepto que elimina el primer elemento en lugar del último.

Instructions

Use la función .shift() para eliminar el primer elemento de myArray , asignando el valor "desviado" a removedFromMyArray .

Tests

tests:
  - text: &#39; <code>myArray</code> ahora debe ser igual a <code>[[&quot;dog&quot;, 3]]</code> .&#39;
    testString: 'assert((function(d){if(d[0][0] == "dog" && d[0][1] === 3 && d[1] == undefined){return true;}else{return false;}})(myArray), "<code>myArray</code> should now equal <code>[["dog", 3]]</code>.");'
  - text: &#39; <code>removedFromMyArray</code> debe contener <code>[&quot;John&quot;, 23]</code> .&#39;
    testString: 'assert((function(d){if(d[0] == "John" && d[1] === 23 && typeof removedFromMyArray === "object"){return true;}else{return false;}})(removedFromMyArray), "<code>removedFromMyArray</code> should contain <code>["John", 23]</code>.");'

Challenge Seed

// Example
var ourArray = ["Stimpson", "J", ["cat"]];
var removedFromOurArray = ourArray.shift();
// removedFromOurArray now equals "Stimpson" and ourArray now equals ["J", ["cat"]].

// Setup
var myArray = [["John", 23], ["dog", 3]];

// Only change code below this line.
var removedFromMyArray;

After Test

console.info('after the test');

Solution

var myArray = [["John", 23], ["dog", 3]];

// Only change code below this line.
var removedFromMyArray = myArray.shift();