


Detailed 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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