--- id: 587d7db4367417b2b2512b90 challengeType: 1 forumTopicId: 301345 title: 同时用多种模式匹配文字字符串 --- ## Description
使用正则表达式/coding/,你可以在其他字符串中查找"coding"。 这对于搜寻单个字符串非常有用,但仅限于一种匹配模式。你可以使用|操作符来匹配多个规则。 此操作符匹配操作符前面或后面的字符。例如,如果你想匹配"yes""no",你需要的正则表达式是/yes|no/。 你还可以匹配多个规则,这可以通过添加更多的匹配模式来实现。这些匹配模式将包含更多的|操作符来分隔它们,比如/yes|no|maybe/
## Instructions
完成正则表达式petRegex以匹配"dog""cat""bird"或者"fish"
## Tests
```yml tests: - text: "对于字符串'John has a pet dog.',你的正则表达式petRegextest方法应该返回true。" testString: assert(petRegex.test('John has a pet dog.')); - text: "对于字符串'Emma has a pet rock.',你的正则表达式petRegextest方法应该返回false。" testString: assert(!petRegex.test('Emma has a pet rock.')); - text: "对于字符串'Emma has a pet bird.',你的正则表达式petRegextest方法应该返回true。" testString: assert(petRegex.test('Emma has a pet bird.')); - text: "对于字符串'Liz has a pet cat.',你的正则表达式petRegextest方法应该返回true。" testString: assert(petRegex.test('Liz has a pet cat.')); - text: "对于字符串'Kara has a pet dolphin.',你的正则表达式petRegextest方法应该返回false。" testString: assert(!petRegex.test('Kara has a pet dolphin.')); - text: "对于字符串'Alice has a pet fish.',你的正则表达式petRegextest方法应该返回true。" testString: assert(petRegex.test('Alice has a pet fish.')); - text: "对于字符串'Jimmy has a pet computer.',你的正则表达式petRegextest方法应该返回false。" testString: assert(!petRegex.test('Jimmy has a pet computer.')); ```
## Challenge Seed
```js let petString = "James has a pet cat."; let petRegex = /change/; // Change this line let result = petRegex.test(petString); ```
## Solution
```js let petString = "James has a pet cat."; let petRegex = /dog|cat|bird|fish/; // Change this line let result = petRegex.test(petString); ```