77 lines
2.3 KiB
Markdown
77 lines
2.3 KiB
Markdown
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---
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id: 5c3dda8b4d8df89bea71600f
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title: Check For Mixed Grouping of Characters
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challengeType: 1
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forumTopicId: 301339
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localeTitle: 检查混合字符组
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---
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## Description
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<section id='description'>
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有时候我们想使用正则表达式里的括号 <code>()</code> 来检查字符组。
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如果想在字符串找到 <code>Penguin</code> 或 <code>Pumpkin</code>，可以这个正则表达式：<code>/P(engu|umpk)in/g</code>。
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然后使用 <code>test()</code> 方法检查 test 字符串里面是否包含字符组。
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```js
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let testStr = "Pumpkin";
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let testRegex = /P(engu|umpk)in/g;
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testRegex.test(testStr);
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// Returns true
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```
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</section>
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## Instructions
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<section id='instructions'>
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完善正则表达式，使其以区分大小写的方式检查 <code>Franklin Roosevelt</code> 或 <code>Eleanor Roosevelt</code> 的名字，并且应该忽略 middle names。
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然后完善代码，使创建的正则检查 <code>myString</code>，根据正则是否匹配返回 <code>true</code> 或 <code>false</code>。
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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: 正则 <code>myRegex</code> 测试 <code>Franklin D. Roosevelt</code> 应该返回 <code>true</code>。
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testString: myRegex.lastIndex = 0; assert(myRegex.test('Franklin D. Roosevelt'));
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- text: 正则 <code>myRegex</code> 测试 <code>Eleanor Roosevelt</code> 应该返回 <code>true</code>。
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testString: myRegex.lastIndex = 0; assert(myRegex.test('Eleanor Roosevelt'));
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- text: 正则 <code>myRegex</code> 测试 <code>Franklin Rosevelt</code> 应该返回 <code>false</code>。
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testString: myRegex.lastIndex = 0; assert(!myRegex.test('Franklin Rosevelt'));
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- text: 应该使用 <code>.test()</code> 来测试正则。
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testString: assert(code.match(/myRegex.test\(\s*myString\s*\)/));
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- text: result 应该返回 <code>true</code>。
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testString: assert(result === true);
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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 myString = "Eleanor Roosevelt";
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let myRegex = /False/; // Change this line
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let result = false; // Change this line
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// After passing the challenge experiment with myString and see how the grouping works
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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 myString = "Eleanor Roosevelt";
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let myRegex = /(Franklin|Eleanor).*Roosevelt/;
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let result = myRegex.test(myString);
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```
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</section>
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