freeCodeCamp/extract-matches.md at 873fce02a2d2124f3b76ce3f317fb29b34abb542

Oliver Eyton-Williams dec409a4bd fix: s/localeTitle/title/g

2020-10-06 23:10:08 +05:30

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id, challengeType, forumTopicId, title

id	challengeType	forumTopicId	title
587d7db4367417b2b2512b92	1	301340	提取匹配项

Description

到目前为止，只是检查了一个匹配模式是否存在于字符串中。还可以使用.match()方法来提取找到的实际匹配项。可以使用字符串来调用.match()方法，并在括号内传入正则表达式。以下是一个示例：

"Hello, World!".match(/Hello/);
// Returns ["Hello"]
let ourStr = "Regular expressions";
let ourRegex = /expressions/;
ourStr.match(ourRegex);
// Returns ["expressions"]

Instructions

利用.match()方法提取单词coding。

Tests

tests:
  - text: <code>结果</code>应该包含单词<code>coding</code>。
    testString: assert(result.join() === "coding");
  - text: 你的正则表达式<code>codingRegex</code>应该搜寻<code>coding</code>。
    testString: assert(codingRegex.source === "coding");
  - text: 你应该使用<code>.match()</code>方法。
    testString: assert(code.match(/\.match\(.*\)/));

Challenge Seed

let extractStr = "Extract the word 'coding' from this string.";
let codingRegex = /change/; // Change this line
let result = extractStr; // Change this line

Solution

let extractStr = "Extract the word 'coding' from this string.";
let codingRegex = /coding/; // Change this line
let result = extractStr.match(codingRegex); // Change this line

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