81 lines
2.3 KiB
Markdown
81 lines
2.3 KiB
Markdown
---
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id: 587d7daa367417b2b2512b6c
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challengeType: 1
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forumTopicId: 18221
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localeTitle: 使用 join 方法将数组组合成字符串
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---
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## Description
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<section id='description'>
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<code>join</code>方法用来把数组中的所有元素放入一个字符串，并通过指定的分隔符参数进行分隔。
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举个例子：
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```js
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var arr = ["Hello", "World"];
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var str = arr.join(" ");
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// Sets str to "Hello World"
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```
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</section>
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## Instructions
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<section id='instructions'>
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在函数<code>sentensify</code>内用<code>join</code>方法（及其他方法）用字符串<code>str</code>中的单词造句，这个函数应返回一个字符串。举个例子，"I-like-Star-Wars" 会被转换成 "I like Star Wars"。在此挑战中请勿使用<code>replace</code>方法。
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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: 应使用<code>join</code>方法。
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testString: assert(code.match(/\.join/g));
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- text: 不能使用<code>replace</code>方法。
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testString: assert(!code.match(/\.replace/g));
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- text: "<code>sentensify('May-the-force-be-with-you')</code>应返回一个字符串"
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testString: assert(typeof sentensify("May-the-force-be-with-you") === "string");
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- text: "<code>sentensify('May-the-force-be-with-you')</code>应返回<code>'May the force be with you'</code>。"
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testString: assert(sentensify("May-the-force-be-with-you") === "May the force be with you");
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- text: "<code>sentensify('The.force.is.strong.with.this.one')</code>应返回<code>'The force is strong with this one'</code>。"
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testString: assert(sentensify("The.force.is.strong.with.this.one") === "The force is strong with this one");
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- text: "<code>sentensify('There,has,been,an,awakening')</code>应返回<code>'There has been an awakening'</code>。"
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testString: assert(sentensify("There,has,been,an,awakening") === "There has been an awakening");
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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 sentensify(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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sentensify("May-the-force-be-with-you");
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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 sentensify(str) {
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// Add your code below this line
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return str.split(/\W/).join(' ');
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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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