freeCodeCamp/curriculum/challenges/chinese/02-javascript-algorithms-and-data-structures/regular-expressions/match-a-literal-string-with-different-possibilities.md

id, challengeType, forumTopicId, localeTitle

id	challengeType	forumTopicId	localeTitle
587d7db4367417b2b2512b90	1	301345	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"或"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

tests:
  - text: "对于字符串<code>'John has a pet dog.'</code>，你的正则表达式<code>petRegex</code>的<code>test</code>方法应该返回<code>true</code>。"
    testString: assert(petRegex.test('John has a pet dog.'));
  - text: "对于字符串<code>'Emma has a pet rock.'</code>，你的正则表达式<code>petRegex</code>的<code>test</code>方法应该返回<code>false</code>。"
    testString: assert(!petRegex.test('Emma has a pet rock.'));
  - text: "对于字符串<code>'Emma has a pet bird.'</code>，你的正则表达式<code>petRegex</code>的<code>test</code>方法应该返回<code>true</code>。"
    testString: assert(petRegex.test('Emma has a pet bird.'));
  - text: "对于字符串<code>'Liz has a pet cat.'</code>，你的正则表达式<code>petRegex</code>的<code>test</code>方法应该返回<code>true</code>。"
    testString: assert(petRegex.test('Liz has a pet cat.'));
  - text: "对于字符串<code>'Kara has a pet dolphin.'</code>，你的正则表达式<code>petRegex</code>的<code>test</code>方法应该返回<code>false</code>。"
    testString: assert(!petRegex.test('Kara has a pet dolphin.'));
  - text: "对于字符串<code>'Alice has a pet fish.'</code>，你的正则表达式<code>petRegex</code>的<code>test</code>方法应该返回<code>true</code>。"
    testString: assert(petRegex.test('Alice has a pet fish.'));
  - text: "对于字符串<code>'Jimmy has a pet computer.'</code>，你的正则表达式<code>petRegex</code>的<code>test</code>方法应该返回<code>false</code>。"
    testString: assert(!petRegex.test('Jimmy has a pet computer.'));

Challenge Seed

let petString = "James has a pet cat.";
let petRegex = /change/; // Change this line
let result = petRegex.test(petString);

Solution

let petString = "James has a pet cat.";
let petRegex = /dog|cat|bird|fish/; // Change this line
let result = petRegex.test(petString);