64 lines
3.2 KiB
Markdown
64 lines
3.2 KiB
Markdown
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---
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id: a0b5010f579e69b815e7c5d6
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title: Search and Replace
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isRequired: true
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challengeType: 5
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videoUrl: ''
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localeTitle: 搜索和替换
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---
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## Description
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<section id="description">使用提供的参数执行搜索并替换句子并返回新句子。第一个参数是执行搜索和替换的句子。第二个参数是你要替换的词（之前）。第三个参数是你将用（后）替换第二个参数。 <strong>注意</strong> <br>在更换原始单词时保留原始单词中第一个字符的大小写。例如，如果您的意思是将“Book”替换为“dog”，则应将其替换为“Dog”。如果卡住，请记住使用<a href="http://forum.freecodecamp.org/t/how-to-get-help-when-you-are-stuck/19514" target="_blank">Read-Search-Ask</a> 。尝试配对程序。编写自己的代码。 </section>
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## Instructions
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<section id="instructions">
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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: '<code>myReplace("Let us go to the store", "store", "mall")</code>应该返回“让我们去商场”。'
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testString: 'assert.deepEqual(myReplace("Let us go to the store", "store", "mall"), "Let us go to the mall", "<code>myReplace("Let us go to the store", "store", "mall")</code> should return "Let us go to the mall".");'
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- text: '<code>myReplace("He is Sleeping on the couch", "Sleeping", "sitting")</code>应该回归“他正坐在沙发上”。'
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testString: 'assert.deepEqual(myReplace("He is Sleeping on the couch", "Sleeping", "sitting"), "He is Sitting on the couch", "<code>myReplace("He is Sleeping on the couch", "Sleeping", "sitting")</code> should return "He is Sitting on the couch".");'
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- text: '<code>myReplace("This has a spellngi error", "spellngi", "spelling")</code>应该返回“这有一个拼写错误”。'
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testString: 'assert.deepEqual(myReplace("This has a spellngi error", "spellngi", "spelling"), "This has a spelling error", "<code>myReplace("This has a spellngi error", "spellngi", "spelling")</code> should return "This has a spelling error".");'
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- text: '<code>myReplace("His name is Tom", "Tom", "john")</code>应该回归“他的名字是约翰”。'
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testString: 'assert.deepEqual(myReplace("His name is Tom", "Tom", "john"), "His name is John", "<code>myReplace("His name is Tom", "Tom", "john")</code> should return "His name is John".");'
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- text: '<code>myReplace("Let us get back to more Coding", "Coding", "algorithms")</code>应该返回“让我们回到更多算法”。'
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testString: 'assert.deepEqual(myReplace("Let us get back to more Coding", "Coding", "algorithms"), "Let us get back to more Algorithms", "<code>myReplace("Let us get back to more Coding", "Coding", "algorithms")</code> should return "Let us get back to more Algorithms".");'
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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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function myReplace(str, before, after) {
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return str;
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}
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myReplace("A quick brown fox jumped over the lazy dog", "jumped", "leaped");
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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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