freeCodeCamp/curriculum/challenges/chinese/02-javascript-algorithms-and-data-structures/basic-javascript/word-blanks.md

---
id: 56533eb9ac21ba0edf2244bb
title: 填词造句
challengeType: 1
videoUrl: 'https://scrimba.com/c/caqn8zuP'
forumTopicId: 18377
dashedName: word-blanks
---

# --description--

现在，我们来用字符串的相关知识实现一个 "[Mad Libs](https://en.wikipedia.org/wiki/Mad_Libs)" 类的文字游戏，称为 "Word Blanks"。 你将创建一个（可选幽默的）“填空”样式句子。

在 "Mad Libs" 游戏中，提供一个缺少一些单词的句子，缺少的单词包括名词，动词，形容词和副词等。然后，你选择一些单词填写句子缺失的地方，使句子完整并且有意义。

思考一下这句话 - "It was really **\_\_\_\_**, and we **\_\_\_\_** ourselves **\_\_\_\_**"。这句话有三个缺失的部分 - 形容词，动词和副词，选择合适单词填入完成它。然后将完成的句子赋值给变量，如下所示：

```js
var sentence = "It was really " + "hot" + ", and we " + "laughed" + " ourselves " + "silly" + ".";
```

# --instructions--

在这个挑战中，我们为你提供名词，动词，形容词和副词。你需要使用合适单词以及我们提供的单词来形成完整的句子。

你需要使用字符串连接运算符`+`来拼接字符串变量：`myNoun`，`myAdjective`，`myVerb`，和`myAdverb`来构建一个新字符串。然后，将新字符串赋给`result`变量。

你还需要考虑字符串中的空格，确保句子的所有单词之间有空格。结果应该是一个完整的句子。

# --hints--

`wordBlanks("","","","")`应该返回一个字符串。

```js
assert(typeof wordBlanks === 'string');
```

不能改变 `myNoun`、`myVerb`、`myAdjective` 或者 `myAdverb` 的值。

```js
assert(
  myNoun === 'dog' &&
    myVerb === 'ran' &&
    myAdjective === 'big' &&
    myAdverb === 'quickly'
);
```

不能直接使用 "dog"、"ran"、"big" 或者 "quickly" 来创建 `wordBlanks`。

```js
const newCode = removeAssignments(code);
assert(
  !/dog/.test(newCode) &&
    !/ran/.test(newCode) &&
    !/big/.test(newCode) &&
    !/quickly/.test(newCode)
);
```

`wordBlanks` 应包含分配给变量 `myNoun`、`myVerb`、`myAdjective` 和 `myAdverb` 的所有单词，并用非单词字符（以及 madlib 中的其它单词）分隔。

```js
assert(
  /\bdog\b/.test(wordBlanks) &&
    /\bbig\b/.test(wordBlanks) &&
    /\bran\b/.test(wordBlanks) &&
    /\bquickly\b/.test(wordBlanks)
);
```

# --seed--

## --after-user-code--

```js
const removeAssignments = str => str
  .replace(/myNoun\s*=\s*["']dog["']/g, '')
  .replace(/myAdjective\s*=\s*["']big["']/g, '')
  .replace(/myVerb\s*=\s*["']ran["']/g, '')
  .replace(/myAdverb\s*=\s*["']quickly["']/g, '');
```

## --seed-contents--

```js
var myNoun = "dog";
var myAdjective = "big";
var myVerb = "ran";
var myAdverb = "quickly";

// Only change code below this line
var wordBlanks = ""; // Change this line
// Only change code above this line
```

# --solutions--

```js
var myNoun = "dog";
var myAdjective = "big";
var myVerb = "ran";
var myAdverb = "quickly";

var wordBlanks = "Once there was a " + myNoun + " which was very " + myAdjective + ". ";
wordBlanks += "It " + myVerb + " " + myAdverb + " around the yard.";
```