2018-10-10 22:03:03 +00:00
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---
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id: 587d7db3367417b2b2512b8f
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2021-03-15 03:20:39 +00:00
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title: 匹配文字字符串
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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: 301355
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2021-01-13 02:31:00 +00:00
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dashedName: match-literal-strings
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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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在上一个挑战中,使用正则表达式 `/Hello/` 搜索到了字符串 `Hello`。 那个正则表达式在字符串中搜寻 `Hello` 的文字匹配。 下面是另一个在字符串中搜寻 `Kevin` 的示例:
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2020-08-04 07:14:01 +00:00
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```js
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let testStr = "Hello, my name is Kevin.";
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let testRegex = /Kevin/;
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testRegex.test(testStr);
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```
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2021-03-15 03:20:39 +00:00
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`test` 方法会返回 `true`。
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任何其他形式的 `Kevin` 都不会被匹配。 例如,正则表达式 `/Kevin/` 不会匹配 `kevin` 或者`KEVIN`。
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2020-08-04 07:14:01 +00:00
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```js
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let wrongRegex = /kevin/;
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wrongRegex.test(testStr);
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```
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2021-03-15 03:20:39 +00:00
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此 `test` 调用将返回 `false`。
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后续的挑战将为你展示如何匹配其他形式的字符串。
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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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# --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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完成正则表达式 `waldoRegex`,在字符串 `waldoIsHiding` 中匹配到文本 `"Waldo"`。
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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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你的正则表达式 `waldoRegex` 应该匹配到 `Waldo`。
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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(waldoRegex.test(waldoIsHiding));
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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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你的正则表达式 `waldoRegex` 不应该搜寻其他的任何内容。
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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(!waldoRegex.test('Somewhere is hiding in this text.'));
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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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你应该使用你的正则表达式对字符串执行文字匹配。
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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(!/\/.*\/i/.test(code));
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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 waldoIsHiding = "Somewhere Waldo is hiding in this text.";
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let waldoRegex = /search/; // Change this line
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let result = waldoRegex.test(waldoIsHiding);
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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 waldoIsHiding = "Somewhere Waldo is hiding in this text.";
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let waldoRegex = /Waldo/; // Change this line
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let result = waldoRegex.test(waldoIsHiding);
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```
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