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								id: 587d7db4367417b2b2512b93
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											2021-03-14 21:20:39 -06:00
										 
									 
								 
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								title: 全局匹配
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								challengeType: 1
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								forumTopicId: 301342
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											2021-01-13 03:31:00 +01:00
										 
									 
								 
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								dashedName: find-more-than-the-first-match
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								---
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								# --description--
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								到目前为止,只能提取或搜寻一次模式匹配。
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								```js
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								let testStr = "Repeat, Repeat, Repeat";
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								let ourRegex = /Repeat/;
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								testStr.match(ourRegex);
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								```
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								在这里 `match` 将返回 `["Repeat"]`。
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								若要多次搜寻或提取模式匹配,可以使用 `g` 标志。
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								```js
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								let repeatRegex = /Repeat/g;
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								testStr.match(repeatRegex);
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								```
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								这里 `match` 返回值 `["Repeat", "Repeat", "Repeat"]`
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								# --instructions--
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								使用正则表达式 `starRegex`,从字符串 `twinkleStar` 中匹配所有的 `Twinkle` 单词并提取出来。
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								**注意:**  
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								在正则表达式上可以有多个标志,比如 `/search/gi`
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								# --hints--
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								你的正则表达式 `starRegex` 应该使用全局标志 `g`
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								```js
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								assert(starRegex.flags.match(/g/).length == 1);
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								```
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								你的正则表达式 `starRegex` 应该使用忽略大小写标志 `i`
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								```js
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								assert(starRegex.flags.match(/i/).length == 1);
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								```
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								你的匹配应该匹配单词 `Twinkle` 的两个匹配项
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								```js
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								assert(
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								  result.sort().join() ==
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								    twinkleStar
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								      .match(/twinkle/gi)
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								      .sort()
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								      .join()
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								);
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								```
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								你的匹配 `result` 应该包含两个元素
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								```js
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								assert(result.length == 2);
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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 twinkleStar = "Twinkle, twinkle, little star";
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								let starRegex = /change/; // Change this line
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								let result = twinkleStar; // Change this line
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								```
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								# --solutions--
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								```js
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								let twinkleStar = "Twinkle, twinkle, little star";
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								let starRegex = /twinkle/gi;
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								let result = twinkleStar.match(starRegex);
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								```
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