正则表达式是一种强大的文本处理工具，在编程和数据处理中广泛应用。其中，match方法是正则表达式中的一个重要功能，它可以帮助我们高效地查找字符串中符合特定模式的子串。本文将深入探讨match方法的使用技巧，帮助您轻松掌握这一实用工具。
一、match方法简介
match方法是正则表达式对象的一个方法，用于在字符串中查找匹配的子串。其基本语法如下：
string.match(regexp)
其中，string是要搜索的字符串，regexp是正则表达式对象。
二、match方法的返回值
match方法的返回值是一个数组，其中包含了所有匹配的子串。如果没有任何匹配的子串，则返回null。
”`javascript var str = “Today is the 186th day of 2018, I must finish these 2 projects within 21 days.”; var results = str.match(/d+/g); console.log(results); // [“d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, “d”, 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