54 lines
		
	
	
		
			1.8 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
		
		
			
		
	
	
			54 lines
		
	
	
		
			1.8 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
|   | --- | |||
|  | id: 587d7db3367417b2b2512b8e | |||
|  | title: Using the Test Method | |||
|  | challengeType: 1 | |||
|  | videoUrl: '' | |||
|  | localeTitle: 使用测试方法 | |||
|  | --- | |||
|  | 
 | |||
|  | ## Description
 | |||
|  | <section id="description">正则表达式用于编程语言以匹配字符串的一部分。您可以创建模式来帮助您进行匹配。如果你想在字符串<code>"The dog chased the cat"</code>找到单词<code>"the"</code> ,你可以使用以下正则表达式: <code>/the/</code> 。请注意,正则表达式中不需要引号。 JavaScript有多种方法可以使用正则表达式。测试正则表达式的一种方法是使用<code>.test()</code>方法。 <code>.test()</code>方法接受正则表达式,将其应用于字符串(放在括号内),如果模式发现或不存在,则返回<code>true</code>或<code>false</code> 。 <blockquote>让testStr =“freeCodeCamp”; <br>让testRegex = / Code /; <br> testRegex.test(testStr); <br> //返回true </blockquote></section> | |||
|  | 
 | |||
|  | ## Instructions
 | |||
|  | <section id="instructions">使用<code>.test()</code>方法在字符串<code>myString</code>上应用正则表达式<code>myRegex</code> 。 </section> | |||
|  | 
 | |||
|  | ## Tests
 | |||
|  | <section id='tests'> | |||
|  | 
 | |||
|  | ```yml | |||
|  | tests: | |||
|  |   - text: 你应该使用<code>.test()</code>来测试正则表达式。 | |||
|  |     testString: 'assert(code.match(/myRegex.test\(\s*myString\s*\)/), "You should use <code>.test()</code> to test the regex.");' | |||
|  |   - text: 您的结果应该返回<code>true</code> 。 | |||
|  |     testString: 'assert(result === true, "Your result should return <code>true</code>.");' | |||
|  | 
 | |||
|  | ``` | |||
|  | 
 | |||
|  | </section> | |||
|  | 
 | |||
|  | ## Challenge Seed
 | |||
|  | <section id='challengeSeed'> | |||
|  | 
 | |||
|  | <div id='js-seed'> | |||
|  | 
 | |||
|  | ```js | |||
|  | let myString = "Hello, World!"; | |||
|  | let myRegex = /Hello/; | |||
|  | let result = myRegex; // Change this line | |||
|  | 
 | |||
|  | ``` | |||
|  | 
 | |||
|  | </div> | |||
|  | 
 | |||
|  | 
 | |||
|  | 
 | |||
|  | </section> | |||
|  | 
 | |||
|  | ## Solution
 | |||
|  | <section id='solution'> | |||
|  | 
 | |||
|  | ```js | |||
|  | // solution required | |||
|  | ``` | |||
|  | </section> |