60 lines
1.6 KiB
Markdown
60 lines
1.6 KiB
Markdown
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---
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id: 587d7b84367417b2b2512b36
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challengeType: 1
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forumTopicId: 301190
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localeTitle: 捕获未闭合的括号、方括号、大括号和引号
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---
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## Description
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<section id='description'>
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要注意的另一个语法错误是所有的小括号、方括号、花括号和引号都必须配对。当你编辑代码并插入新代码其中带有括号时，很容易忘记括号闭合。 此外，在将代码块嵌套到其他代码块时要小心，例如将回调函数作为参数添加到方法中。
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避免这种错误的一种方法是，一次性输入完这些符号，然后将光标移回它们之间继续编写。好在，现在大部分编辑器都会帮你自动补全。
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</section>
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## Instructions
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<section id='instructions'>
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修复代码中的两个符号配对错误。
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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: 你应该修复数组缺少的部分。
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testString: assert(code.match(/myArray\s*?=\s*?\[\s*?1\s*?,\s*?2\s*?,\s*?3\s*?\];/g));
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- text: '你应该修复<code>.reduce()</code>方法缺少的部分。控制台应输出 "Sum of array values is: 6"。'
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testString: 'assert(arraySum === 6);'
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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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let myArray = [1, 2, 3;
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let arraySum = myArray.reduce((previous, current => previous + current);
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console.log(`Sum of array values is: ${arraySum}`);
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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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let myArray = [1, 2, 3];
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let arraySum = myArray.reduce((previous, current) => previous + current);
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console.log(`Sum of array values is: ${arraySum}`);
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```
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</section>
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