---
id: 587d7db7367417b2b2512b9e
challengeType: 1
forumTopicId: 301352
localeTitle: 匹配字符串的末尾
---
## Description
在上一个挑战中，学习了使用^符号来搜寻字符串开头的匹配模式。还有一种方法可以搜寻字符串末尾的匹配模式。
可以使用正则表达式的美元符号$来搜寻字符串的结尾。
```js
let theEnding = "This is a never ending story";
let storyRegex = /story$/;
storyRegex.test(theEnding);
// Returns true
let noEnding = "Sometimes a story will have to end";
storyRegex.test(noEnding);
// Returns false
```
## Instructions
使用$在字符串caboose的末尾匹配"caboose"。
## Tests
```yml
tests:
- text: "你应该在正则表达式使用美元符号$来搜寻'caboose'。"
testString: assert(lastRegex.source == "caboose$");
- text: 你的正则表达式不应该使用任何标志。
testString: assert(lastRegex.flags == "");
- text: "你应该在字符串'The last car on a train is the caboose'的末尾匹配'caboose'。"
testString: assert(lastRegex.test("The last car on a train is the caboose"));
```
## Challenge Seed
```js
let caboose = "The last car on a train is the caboose";
let lastRegex = /change/; // Change this line
let result = lastRegex.test(caboose);
```
## Solution
```js
let caboose = "The last car on a train is the caboose";
let lastRegex = /caboose$/; // Change this line
let result = lastRegex.test(caboose);
```