72 lines
3.2 KiB
Markdown
72 lines
3.2 KiB
Markdown
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---
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id: af2170cad53daa0770fabdea
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title: Mutations
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isRequired: true
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challengeType: 5
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videoUrl: ''
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localeTitle: 突变
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---
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## Description
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<section id="description">如果数组的第一个元素中的字符串包含数组第二个元素中字符串的所有字母，则返回true。例如， <code>["hello", "Hello"]</code>应该返回true，因为第二个字符串中的所有字母都出现在第一个字母中，忽略大小写。参数<code>["hello", "hey"]</code>应返回false，因为字符串“hello”不包含“y”。最后， <code>["Alien", "line"]</code>应该返回true，因为“line”中的所有字母都出现在“Alien”中。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> 。编写自己的代码。 </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>mutation(["hello", "hey"])</code>应该返回false。'
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testString: 'assert(mutation(["hello", "hey"]) === false, "<code>mutation(["hello", "hey"])</code> should return false.");'
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- text: '<code>mutation(["hello", "Hello"])</code>应该返回true。'
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testString: 'assert(mutation(["hello", "Hello"]) === true, "<code>mutation(["hello", "Hello"])</code> should return true.");'
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- text: '<code>mutation(["zyxwvutsrqponmlkjihgfedcba", "qrstu"])</code>应该返回true。'
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testString: 'assert(mutation(["zyxwvutsrqponmlkjihgfedcba", "qrstu"]) === true, "<code>mutation(["zyxwvutsrqponmlkjihgfedcba", "qrstu"])</code> should return true.");'
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- text: '<code>mutation(["Mary", "Army"])</code>应该返回true。'
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testString: 'assert(mutation(["Mary", "Army"]) === true, "<code>mutation(["Mary", "Army"])</code> should return true.");'
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- text: '<code>mutation(["Mary", "Aarmy"])</code>应该返回true。'
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testString: 'assert(mutation(["Mary", "Aarmy"]) === true, "<code>mutation(["Mary", "Aarmy"])</code> should return true.");'
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- text: '<code>mutation(["Alien", "line"])</code>应该返回true。'
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testString: 'assert(mutation(["Alien", "line"]) === true, "<code>mutation(["Alien", "line"])</code> should return true.");'
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- text: '<code>mutation(["floor", "for"])</code>应该返回true。'
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testString: 'assert(mutation(["floor", "for"]) === true, "<code>mutation(["floor", "for"])</code> should return true.");'
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- text: '<code>mutation(["hello", "neo"])</code>应该返回false。'
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testString: 'assert(mutation(["hello", "neo"]) === false, "<code>mutation(["hello", "neo"])</code> should return false.");'
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- text: '<code>mutation(["voodoo", "no"])</code>应该返回false。'
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testString: 'assert(mutation(["voodoo", "no"]) === false, "<code>mutation(["voodoo", "no"])</code> should return false.");'
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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 mutation(arr) {
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return arr;
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}
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mutation(["hello", "hey"]);
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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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