freeCodeCamp/curriculum/challenges/chinese/02-javascript-algorithms-and-data-structures/regular-expressions/match-ending-string-patterns.md

id, title, challengeType, forumTopicId, dashedName

id	title	challengeType	forumTopicId	dashedName
587d7db7367417b2b2512b9e	匹配字符串的末尾	1	301352	match-ending-string-patterns

--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。

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"。

--hints--

你应该在正则表达式使用美元符号$来搜寻'caboose'。

assert(lastRegex.source == 'caboose$');

你的正则表达式不应该使用任何标志。

assert(lastRegex.flags == '');

你应该在字符串'The last car on a train is the caboose'的末尾匹配'caboose'。

assert(lastRegex.test('The last car on a train is the caboose'));

--seed--

--seed-contents--

let caboose = "The last car on a train is the caboose";
let lastRegex = /change/; // Change this line
let result = lastRegex.test(caboose);

--solutions--

let caboose = "The last car on a train is the caboose";
let lastRegex = /caboose$/; // Change this line
let result = lastRegex.test(caboose);