freeCodeCamp/curriculum/challenges/chinese/02-javascript-algorithms-and-data-structures/functional-programming/combine-an-array-into-a-string-using-the-join-method.md

---
id: 587d7daa367417b2b2512b6c
title: 使用 join 方法将数组组合成字符串
challengeType: 1
forumTopicId: 18221
---

# --description--

`join`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。

举个例子：

```js
var arr = ["Hello", "World"];
var str = arr.join(" ");
// Sets str to "Hello World"
```

# --instructions--

在函数`sentensify`内用`join`方法（及其他方法）用字符串`str`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`replace`方法。

# --hints--

应使用`join`方法。

```js
assert(code.match(/\.join/g));
```

不能使用`replace`方法。

```js
assert(!code.match(/\.replace/g));
```

`sentensify('May-the-force-be-with-you')`应返回一个字符串

```js
assert(typeof sentensify('May-the-force-be-with-you') === 'string');
```

`sentensify('May-the-force-be-with-you')`应返回`'May the force be with you'`。

```js
assert(sentensify('May-the-force-be-with-you') === 'May the force be with you');
```

`sentensify('The.force.is.strong.with.this.one')`应返回`'The force is strong with this one'`。

```js
assert(
  sentensify('The.force.is.strong.with.this.one') ===
    'The force is strong with this one'
);
```

`sentensify('There,has,been,an,awakening')`应返回`'There has been an awakening'`。

```js
assert(
  sentensify('There,has,been,an,awakening') === 'There has been an awakening'
);
```

# --solutions--