67 lines
1.8 KiB
Markdown
67 lines
1.8 KiB
Markdown
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---
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id: cf1111c1c11feddfaeb8bdef
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title: Modify Array Data With Indexes
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challengeType: 1
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videoUrl: ''
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localeTitle: 使用索引修改数组数据
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---
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## Description
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<section id="description">与字符串不同，数组的条目是<dfn>可变的</dfn> ，可以自由更改。 <strong>例</strong> <blockquote> var ourArray = [50,40,30]; <br> ourArray [0] = 15; //等于[15,40,30] </blockquote> <strong>注意</strong> <br>数组名称和方括号之间不应有任何空格，如<code>array [0]</code> 。尽管JavaScript能够正确处理，但这可能会让其他程序员在阅读代码时感到困惑。 </section>
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## Instructions
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<section id="instructions">将存储在<code>myArray</code>索引<code>0</code>处的数据修改为值<code>45</code> 。 </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>myArray</code>现在应该是[45,64,99]。'
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testString: 'assert((function(){if(typeof myArray != "undefined" && myArray[0] == 45 && myArray[1] == 64 && myArray[2] == 99){return true;}else{return false;}})(), "<code>myArray</code> should now be [45,64,99].");'
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- text: 您应该使用正确的索引来修改<code>myArray</code>的值。
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testString: 'assert((function(){if(code.match(/myArray\[0\]\s*=\s*/g)){return true;}else{return false;}})(), "You should be using correct index to modify the value in <code>myArray</code>.");'
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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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// Example
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var ourArray = [18,64,99];
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ourArray[1] = 45; // ourArray now equals [18,45,99].
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// Setup
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var myArray = [18,64,99];
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// Only change code below this line.
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```
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</div>
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### After Test
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<div id='js-teardown'>
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```js
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console.info('after the test');
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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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