82 lines
2.5 KiB
Markdown
82 lines
2.5 KiB
Markdown
---
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id: 587d7daa367417b2b2512b6b
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challengeType: 1
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forumTopicId: 18305
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title: 使用 split 方法将字符串拆分成数组
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---
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## Description
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<section id='description'>
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<code>split</code>方法用于把字符串分割成字符串数组，接收一个分隔符参数，分隔符可以是用于分解字符串或正则表达式的字符。举个例子，如果分隔符是空格，你会得到一个单词数组；如果分隔符是空字符串，你会得到一个由字符串中每个字符组成的数组。
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下面是两个用空格分隔一个字符串的例子，另一个是用数字的正则表达式分隔：
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```js
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var str = "Hello World";
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var bySpace = str.split(" ");
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// Sets bySpace to ["Hello", "World"]
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var otherString = "How9are7you2today";
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var byDigits = otherString.split(/\d/);
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// Sets byDigits to ["How", "are", "you", "today"]
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```
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因为字符串是固定的，<code>split</code>方法可以更简单的操作它们。
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</section>
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## Instructions
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<section id='instructions'>
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在<code>splitify</code>函数中用<code>split</code>方法将<code>str</code>分割成单词数组，这个方法应该返回一个数组。单词不一定都是用空格分隔，所以数组中不应包含标点符号。
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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: 应该使用<code>split</code>方法。
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testString: assert(code.match(/\.split/g));
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- text: "<code>splitify('Hello World,I-am code')</code>应返回<code>['Hello', 'World', 'I', 'am', 'code']</code>。"
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testString: assert(JSON.stringify(splitify("Hello World,I-am code")) === JSON.stringify(["Hello", "World", "I", "am", "code"]));
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- text: "<code>splitify('Earth-is-our home')</code>应返回<code>['Earth', 'is', 'our', 'home']</code>。"
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testString: assert(JSON.stringify(splitify("Earth-is-our home")) === JSON.stringify(["Earth", "is", "our", "home"]));
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- text: "<code>splitify('This.is.a-sentence')</code>应返回<code>['This', 'is', 'a', 'sentence']</code>。"
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testString: assert(JSON.stringify(splitify("This.is.a-sentence")) === JSON.stringify(["This", "is", "a", "sentence"]));
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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 splitify(str) {
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// Add your code below this line
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// Add your code above this line
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}
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splitify("Hello World,I-am code");
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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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function splitify(str) {
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// Add your code below this line
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return str.split(/\W/);
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// Add your code above this line
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}
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```
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</section>
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