64 lines
2.7 KiB
Markdown
64 lines
2.7 KiB
Markdown
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---
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id: 587d7db9367417b2b2512ba6
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title: Specify Only the Lower Number of Matches
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challengeType: 1
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videoUrl: ''
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localeTitle: 仅指定较低的匹配数
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---
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## Description
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<section id="description">您可以使用大括号<code>quantity specifiers</code>的较低和较高数量的模式。有时您只想指定较低数量的模式而没有上限。要仅指定较少的模式数，请保留第一个数字后跟逗号。例如，要仅匹配字符串<code>"hah"</code>与出现至少<code>3</code>次的字母<code>a</code> ，您的正则表达式将是<code>/ha{3,}h/</code> 。 <blockquote>让A4 =“haaaah”; <br>让A2 =“哈哈”; <br>设A100 =“h”+“a”.repeat（100）+“h”; <br> let multipleA = / ha {3，} h /; <br> multipleA.test（A4）; //返回true <br> multipleA.test（A2）; //返回false <br> multipleA.test（A100）; //返回true </blockquote></section>
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## Instructions
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<section id="instructions">只有当它有四个或更多字母<code>z</code>时才更改正则表达式<code>haRegex</code>以匹配单词<code>"Hazzah"</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: 你的正则表达式应该使用大括号。
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testString: 'assert(haRegex.source.match(/{.*?}/).length > 0, "Your regex should use curly brackets.");'
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- text: 你的正则表达式不应该与<code>"Hazzah"</code>匹配
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testString: 'assert(!haRegex.test("Hazzah"), "Your regex should not match <code>"Hazzah"</code>");'
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- text: 你的正则表达式不应该与<code>"Hazzzah"</code>匹配
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testString: 'assert(!haRegex.test("Hazzzah"), "Your regex should not match <code>"Hazzzah"</code>");'
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- text: 你的正则表达应该匹配<code>"Hazzzzah"</code>
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testString: 'assert(haRegex.test("Hazzzzah"), "Your regex should match <code>"Hazzzzah"</code>");'
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- text: 你的正则表达应该匹配<code>"Hazzzzzah"</code>
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testString: 'assert(haRegex.test("Hazzzzzah"), "Your regex should match <code>"Hazzzzzah"</code>");'
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- text: 你的正则表达应该匹配<code>"Hazzzzzzah"</code>
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testString: 'assert(haRegex.test("Hazzzzzzah"), "Your regex should match <code>"Hazzzzzzah"</code>");'
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- text: 你的正则表达式应该匹配<code>"Hazzah"</code>和30个<code>z</code> 。
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testString: 'assert(haRegex.test("Ha" + "z".repeat(30) + "ah"), "Your regex should match <code>"Hazzah"</code> with 30 <code>z</code>\"s in it.");'
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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 haStr = "Hazzzzah";
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let haRegex = /change/; // Change this line
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let result = haRegex.test(haStr);
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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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