86 lines
7.8 KiB
Markdown
86 lines
7.8 KiB
Markdown
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---
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id: a5de63ebea8dbee56860f4f2
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title: Diff Two Arrays
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isRequired: true
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challengeType: 5
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videoUrl: ''
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localeTitle: 差分两个阵列
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---
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## Description
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<section id="description">比较两个数组并返回一个新数组，其中只有在两个给定数组中的一个中找到的任何项，但不能同时返回两个数组。换句话说，返回两个数组的对称差异。如果卡住，请记得使用<a href="http://forum.freecodecamp.org/t/how-to-get-help-when-you-are-stuck/19514" target="_blank">Read-Search-Ask</a> 。尝试配对程序。编写自己的代码。 <strong>注意</strong> <br>您可以按任何顺序返回包含其元素的数组。 </section>
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## Instructions
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<section id="instructions">
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: '<code>diffArray([1, 2, 3, 5], [1, 2, 3, 4, 5])</code>应该返回一个数组。'
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testString: 'assert(typeof diffArray([1, 2, 3, 5], [1, 2, 3, 4, 5]) === "object", "<code>diffArray([1, 2, 3, 5], [1, 2, 3, 4, 5])</code> should return an array.");'
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- text: '<code>["diorite", "andesite", "grass", "dirt", "pink wool", "dead shrub"], ["diorite", "andesite", "grass", "dirt", "dead shrub"]</code>应该返回<code>["pink wool"]</code> 。'
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testString: 'assert.sameMembers(diffArray(["diorite", "andesite", "grass", "dirt", "pink wool", "dead shrub"], ["diorite", "andesite", "grass", "dirt", "dead shrub"]), ["pink wool"], "<code>["diorite", "andesite", "grass", "dirt", "pink wool", "dead shrub"], ["diorite", "andesite", "grass", "dirt", "dead shrub"]</code> should return <code>["pink wool"]</code>.");'
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- text: '<code>["diorite", "andesite", "grass", "dirt", "pink wool", "dead shrub"], ["diorite", "andesite", "grass", "dirt", "dead shrub"]</code>应该返回一个包含一个项目的数组。'
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testString: 'assert(diffArray(["diorite", "andesite", "grass", "dirt", "pink wool", "dead shrub"], ["diorite", "andesite", "grass", "dirt", "dead shrub"]).length === 1, "<code>["diorite", "andesite", "grass", "dirt", "pink wool", "dead shrub"], ["diorite", "andesite", "grass", "dirt", "dead shrub"]</code> should return an array with one item.");'
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- text: '<code>["andesite", "grass", "dirt", "pink wool", "dead shrub"], ["diorite", "andesite", "grass", "dirt", "dead shrub"]</code>应该返回<code>["diorite", "pink wool"]</code> 。'
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testString: 'assert.sameMembers(diffArray(["andesite", "grass", "dirt", "pink wool", "dead shrub"], ["diorite", "andesite", "grass", "dirt", "dead shrub"]), ["diorite", "pink wool"], "<code>["andesite", "grass", "dirt", "pink wool", "dead shrub"], ["diorite", "andesite", "grass", "dirt", "dead shrub"]</code> should return <code>["diorite", "pink wool"]</code>.");'
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- text: '<code>["andesite", "grass", "dirt", "pink wool", "dead shrub"], ["diorite", "andesite", "grass", "dirt", "dead shrub"]</code>应该返回一个数组有两个项目。'
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testString: 'assert(diffArray(["andesite", "grass", "dirt", "pink wool", "dead shrub"], ["diorite", "andesite", "grass", "dirt", "dead shrub"]).length === 2, "<code>["andesite", "grass", "dirt", "pink wool", "dead shrub"], ["diorite", "andesite", "grass", "dirt", "dead shrub"]</code> should return an array with two items.");'
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- text: '<code>["andesite", "grass", "dirt", "dead shrub"], ["andesite", "grass", "dirt", "dead shrub"]</code>应该返回<code>[]</code> 。'
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testString: 'assert.sameMembers(diffArray(["andesite", "grass", "dirt", "dead shrub"], ["andesite", "grass", "dirt", "dead shrub"]), [], "<code>["andesite", "grass", "dirt", "dead shrub"], ["andesite", "grass", "dirt", "dead shrub"]</code> should return <code>[]</code>.");'
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- text: '<code>["andesite", "grass", "dirt", "dead shrub"], ["andesite", "grass", "dirt", "dead shrub"]</code>应返回一个空数组。'
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testString: 'assert(diffArray(["andesite", "grass", "dirt", "dead shrub"], ["andesite", "grass", "dirt", "dead shrub"]).length === 0, "<code>["andesite", "grass", "dirt", "dead shrub"], ["andesite", "grass", "dirt", "dead shrub"]</code> should return an empty array.");'
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- text: '<code>[1, 2, 3, 5], [1, 2, 3, 4, 5]</code>应该返回<code>[4]</code> 。'
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testString: 'assert.sameMembers(diffArray([1, 2, 3, 5], [1, 2, 3, 4, 5]), [4], "<code>[1, 2, 3, 5], [1, 2, 3, 4, 5]</code> should return <code>[4]</code>.");'
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- text: '<code>[1, 2, 3, 5], [1, 2, 3, 4, 5]</code>应该返回一个带有一个项目的数组。'
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testString: 'assert(diffArray([1, 2, 3, 5], [1, 2, 3, 4, 5]).length === 1, "<code>[1, 2, 3, 5], [1, 2, 3, 4, 5]</code> should return an array with one item.");'
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- text: '<code>[1, "calf", 3, "piglet"], [1, "calf", 3, 4]</code>应返回<code>["piglet", 4]</code> 。'
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testString: 'assert.sameMembers(diffArray([1, "calf", 3, "piglet"], [1, "calf", 3, 4]), ["piglet", 4], "<code>[1, "calf", 3, "piglet"], [1, "calf", 3, 4]</code> should return <code>["piglet", 4]</code>.");'
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- text: '<code>[1, "calf", 3, "piglet"], [1, "calf", 3, 4]</code>应该返回一个包含两个项目的数组。'
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testString: 'assert(diffArray([1, "calf", 3, "piglet"], [1, "calf", 3, 4]).length === 2, "<code>[1, "calf", 3, "piglet"], [1, "calf", 3, 4]</code> should return an array with two items.");'
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- text: '<code>[], ["snuffleupagus", "cookie monster", "elmo"]</code>应该返回<code>["snuffleupagus", "cookie monster", "elmo"]</code> 。'
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testString: 'assert.sameMembers(diffArray([], ["snuffleupagus", "cookie monster", "elmo"]), ["snuffleupagus", "cookie monster", "elmo"], "<code>[], ["snuffleupagus", "cookie monster", "elmo"]</code> should return <code>["snuffleupagus", "cookie monster", "elmo"]</code>.");'
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- text: '<code>[], ["snuffleupagus", "cookie monster", "elmo"]</code>应该返回一个包含三个项目的数组。'
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testString: 'assert(diffArray([], ["snuffleupagus", "cookie monster", "elmo"]).length === 3, "<code>[], ["snuffleupagus", "cookie monster", "elmo"]</code> should return an array with three items.");'
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- text: '<code>[1, "calf", 3, "piglet"], [7, "filly"]</code> <code>[1, "calf", 3, "piglet", 7, "filly"]</code> <code>[1, "calf", 3, "piglet"], [7, "filly"]</code>应该返回<code>[1, "calf", 3, "piglet", 7, "filly"]</code> 。'
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testString: 'assert.sameMembers(diffArray([1, "calf", 3, "piglet"], [7, "filly"]), [1, "calf", 3, "piglet", 7, "filly"], "<code>[1, "calf", 3, "piglet"], [7, "filly"]</code> should return <code>[1, "calf", 3, "piglet", 7, "filly"]</code>.");'
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- text: '<code>[1, "calf", 3, "piglet"], [7, "filly"]</code>应该返回一个包含六个项目的数组。'
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testString: 'assert(diffArray([1, "calf", 3, "piglet"], [7, "filly"]).length === 6, "<code>[1, "calf", 3, "piglet"], [7, "filly"]</code> should return an array with six items.");'
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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function diffArray(arr1, arr2) {
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var newArr = [];
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// Same, same; but different.
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return newArr;
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}
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diffArray([1, 2, 3, 5], [1, 2, 3, 4, 5]);
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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// solution required
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```
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</section>
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