74 lines
1.5 KiB
Markdown
74 lines
1.5 KiB
Markdown
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---
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id: 587d7db4367417b2b2512b92
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title: 提取匹配項
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challengeType: 1
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forumTopicId: 301340
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dashedName: extract-matches
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---
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# --description--
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到目前爲止，只是檢查了一個匹配模式是否存在於字符串中。 還可以使用 `.match()` 方法來提取找到的實際匹配項。
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可以使用字符串來調用 `.match()` 方法，並在括號內傳入正則表達式。
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請看下面的舉例：
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```js
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"Hello, World!".match(/Hello/);
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let ourStr = "Regular expressions";
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let ourRegex = /expressions/;
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ourStr.match(ourRegex);
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```
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這裏第一個 `match` 將返回 `["Hello"]` 第二個將返回 `["expressions"]`。
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請注意， `.match` 語法是目前爲止一直使用的 `.test` 方法中的“反向”：
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```js
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'string'.match(/regex/);
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/regex/.test('string');
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```
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# --instructions--
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利用 `.match()` 方法提取單詞 `coding`。
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# --hints--
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`result` 應該有字符串 `coding`
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```js
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assert(result.join() === 'coding');
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```
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您的 regex `codingRegex` 應該搜索字符串 `coding`
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```js
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assert(codingRegex.source === 'coding');
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```
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您應該使用 `.match()` 方法。
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```js
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assert(code.match(/\.match\(.*\)/));
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```
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# --seed--
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## --seed-contents--
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```js
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let extractStr = "Extract the word 'coding' from this string.";
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let codingRegex = /change/; // Change this line
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let result = extractStr; // Change this line
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```
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# --solutions--
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```js
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let extractStr = "Extract the word 'coding' from this string.";
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let codingRegex = /coding/; // Change this line
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let result = extractStr.match(codingRegex); // Change this line
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```
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