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HomeWeb Front-endJS TutorialDetailed explanation of the use of \d metacharacter in regular expressions (with code)

这次给大家带来正则表达式的\d元字符使用详解(附代码),使用正则表达式\d元字符的注意事项有哪些,下面就是实战案例,一起来看一下。

正则表达式\d元字符:
\d元字符可以匹配数字字符,等价于"[0-9]"。

语法结构:

构造函数方式:

new RegExp(\\d)

对象直接量方式:

/\d/

浏览器支持:

IE浏览器支持此元字符。
火狐浏览器支持此元字符。
谷歌浏览器支持此元字符。

实例代码:

实例一:

var str="I love antzone \n and you 360"; 
var reg=new RegExp("\\d","g"); 
console.log(str.match(reg));

以上代码可以匹配字符串中的所有数字。

实例二:

var str="I love antzone \n and you 360"; 
var reg=/\d/g; 
console.log(str.match(reg));

此代码的作用和上面的代码是一样的。

还有很多情况下,例如很多情况下我们复制的代码最前面都有一个数字,如果上百行代码前面都有数字我们就可以通过正则来进行替换

例如:

1 alert("脚本之家");
2 var str="I love antzone \n and you 360"; 
3 var reg=/\d/g; 
4console.log(str.match(reg));

例如下面的正则

^[0-9]*\.

就可以完美替换了前面的数字

相信看了本文案例你已经掌握了方法,更多精彩请关注php中文网其它相关文章!

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