66 lines
		
	
	
		
			2.7 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
			
		
		
	
	
			66 lines
		
	
	
		
			2.7 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
| ---
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| id: 5d712346c441eddfaeb5bdef
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| title: Match All Numbers
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| challengeType: 1
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| videoUrl: ''
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| localeTitle: 匹配所有号码
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| ---
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| 
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| ## Description
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| <section id="description">您已经学习了常用字符串模式(如字母数字)的快捷方式。另一种常见模式是寻找数字或数字。查找数字字符的快捷方式是<code>\d</code> ,小写<code>d</code> 。这等于字符类<code>[0-9]</code> ,它查找0到9之间任意数字的单个字符。 </section>
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| 
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| ## Instructions
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| <section id="instructions">使用速记字符类<code>\d</code>来计算电影标题中的位数。写出的数字(“六”而不是六)不计算在内。 </section>
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| 
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| ## Tests
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| <section id='tests'>
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| 
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| ```yml
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| tests:
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|   - text: 您的正则表达式应使用快捷方式字符来匹配数字字符
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|     testString: 'assert(/\\d/.test(numRegex.source), "Your regex should use the shortcut character to match digit characters");'
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|   - text: 你的正则表达式应该使用全局标志。
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|     testString: 'assert(numRegex.global, "Your regex should use the global flag.");'
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|   - text: 你的正则表达式应该在<code>"9"</code>找到1位数。
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|     testString: 'assert("9".match(numRegex).length == 1, "Your regex should find 1 digit in <code>"9"</code>.");'
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|   - text: 你的正则表达式应该在<code>"Catch 22"</code>找到2位数字。
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|     testString: 'assert("Catch 22".match(numRegex).length == 2, "Your regex should find 2 digits in <code>"Catch 22"</code>.");'
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|   - text: 你的正则表达式应该在<code>"101 Dalmatians"</code>找到3位数字。
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|     testString: 'assert("101 Dalmatians".match(numRegex).length == 3, "Your regex should find 3 digits in <code>"101 Dalmatians"</code>.");'
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|   - text: '你的正则表达式应该在<code>"One, Two, Three"</code>找不到数字。'
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|     testString: 'assert("One, Two, Three".match(numRegex) == null, "Your regex should find no digits in <code>"One, Two, Three"</code>.");'
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|   - text: 您的正则表达式应该在<code>"21 Jump Street"</code>找到2位数字。
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|     testString: 'assert("21 Jump Street".match(numRegex).length == 2, "Your regex should find 2 digits in <code>"21 Jump Street"</code>.");'
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|   - text: '你的正则表达式应该在<code>"2001: A Space Odyssey"</code>找到4位数字。'
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|     testString: 'assert("2001: A Space Odyssey".match(numRegex).length == 4, "Your regex should find 4 digits in <code>"2001: A Space Odyssey"</code>.");'
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| 
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| ```
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| 
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| </section>
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| 
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| ## Challenge Seed
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| <section id='challengeSeed'>
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| 
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| <div id='js-seed'>
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| 
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| ```js
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| let numString = "Your sandwich will be $5.00";
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| let numRegex = /change/; // Change this line
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| let result = numString.match(numRegex).length;
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| 
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| ```
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| 
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| </div>
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| 
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| 
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| 
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| </section>
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| 
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| ## Solution
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| <section id='solution'>
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| 
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| ```js
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| // solution required
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| ```
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| </section>
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