2018-10-10 22:03:03 +00:00
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---
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id: 587d7db7367417b2b2512b9c
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2021-03-15 03:20:39 +00:00
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title: 在狩猎中找到一个或多个罪犯
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2018-10-10 22:03:03 +00:00
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challengeType: 1
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2020-08-04 07:14:01 +00:00
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forumTopicId: 301343
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2021-01-13 02:31:00 +00:00
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dashedName: find-one-or-more-criminals-in-a-hunt
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2018-10-10 22:03:03 +00:00
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---
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2020-12-16 07:37:30 +00:00
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# --description--
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2021-03-15 03:20:39 +00:00
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是时候停一停来测试你的正则表达式使用能力了。 一群罪犯越狱逃跑了,但你不知道有多少人。 然而,你知道他们不在一起时会保持紧密联系。 你有责任立刻找到所有的罪犯。
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2020-12-16 07:37:30 +00:00
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2021-03-15 03:20:39 +00:00
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这里有一个示例来提示如何做到这一点:
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2020-12-16 07:37:30 +00:00
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2021-03-15 03:20:39 +00:00
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当字母`z`在一行中出现一次或连续多次时,正则表达式`/z+/`会匹配到它。 它会在以下所有字符串中找到匹配项:
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2020-08-04 07:14:01 +00:00
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```js
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"z"
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"zzzzzz"
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"ABCzzzz"
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"zzzzABC"
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"abczzzzzzzzzzzzzzzzzzzzzabc"
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```
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2021-03-15 03:20:39 +00:00
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但是它不会在以下字符串中找到匹配项,因为它们中没有字母`z`:
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2020-08-04 07:14:01 +00:00
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```js
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""
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"ABC"
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"abcabc"
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```
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2020-12-16 07:37:30 +00:00
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# --instructions--
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2018-10-10 22:03:03 +00:00
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2021-03-15 03:20:39 +00:00
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编写一个贪婪正则表达式,在一组其他人中匹配到一个或多个罪犯。 罪犯由大写字母`C`表示。
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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# --hints--
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2018-10-10 22:03:03 +00:00
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2021-03-15 03:20:39 +00:00
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您的正则表达式应该匹配字符串 `C` 中的一个罪犯(`C`)
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2018-10-10 22:03:03 +00:00
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```js
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2020-12-16 07:37:30 +00:00
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assert('C'.match(reCriminals) && 'C'.match(reCriminals)[0] == 'C');
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```
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2018-10-10 22:03:03 +00:00
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2021-03-15 03:20:39 +00:00
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您的正则表达式应该匹配字符串 `CC` 中的两个罪犯(`CC`)
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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```js
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assert('CC'.match(reCriminals) && 'CC'.match(reCriminals)[0] == 'CC');
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2018-10-10 22:03:03 +00:00
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```
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2021-03-15 03:20:39 +00:00
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您的正则表达式应该在字符串 `P1P5P4CCCcP2P6P3` 中匹配三个罪犯(`CCC`)。
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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```js
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assert(
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2021-03-15 03:20:39 +00:00
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'P1P5P4CCCcP2P6P3'.match(reCriminals) &&
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'P1P5P4CCCcP2P6P3'.match(reCriminals)[0] == 'CCC'
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2020-12-16 07:37:30 +00:00
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);
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```
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2018-10-10 22:03:03 +00:00
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2021-03-15 03:20:39 +00:00
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您的正则表达式应该在字符串 `P6P2P7P4P5CCCCCP3P1`中匹配五个罪犯(`CCCCC`)
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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```js
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assert(
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'P6P2P7P4P5CCCCCP3P1'.match(reCriminals) &&
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'P6P2P7P4P5CCCCCP3P1'.match(reCriminals)[0] == 'CCCCC'
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);
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```
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2018-10-10 22:03:03 +00:00
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2021-03-15 03:20:39 +00:00
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你的正则表达式在`""`中不应该匹配到任何罪犯
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2018-10-10 22:03:03 +00:00
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```js
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2020-12-16 07:37:30 +00:00
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assert(!reCriminals.test(''));
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```
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2020-08-04 07:14:01 +00:00
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2021-03-15 03:20:39 +00:00
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你的正则表达式在`P1P2P3`中不应该匹配到任何罪犯
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2020-08-04 07:14:01 +00:00
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2020-12-16 07:37:30 +00:00
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```js
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assert(!reCriminals.test('P1P2P3'));
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```
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2021-03-15 03:20:39 +00:00
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你的正则表达式应该在`P2P1P5P4CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCP3`中匹配五十个 罪犯('`CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC`')。
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2020-08-04 07:14:01 +00:00
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2020-12-16 07:37:30 +00:00
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```js
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assert(
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'P2P1P5P4CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCP3'.match(
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reCriminals
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) &&
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'P2P1P5P4CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCP3'.match(
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reCriminals
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)[0] == 'CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC'
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);
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2018-10-10 22:03:03 +00:00
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```
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2020-08-04 07:14:01 +00:00
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2021-01-13 02:31:00 +00:00
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# --seed--
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## --seed-contents--
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```js
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let reCriminals = /./; // Change this line
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```
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2020-12-16 07:37:30 +00:00
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# --solutions--
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2021-01-13 02:31:00 +00:00
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```js
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let reCriminals = /C+/; // Change this line
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```
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