正则表达式 2016-12-21
感谢海浪提供的正则,原贴请参见:
http://www.iecn.net/bbs/view/106503.html
因为要做个模板替换的东西,里面的变量采用${MyName}这种格式的命名方式。在进行全局替换时,遇到两个难点:
1.要么无法替换掉$等特殊符号
2.要么无法忽略大小写
在海浪有帮助下,终于有了最佳实现方式:)
最佳实现方式:
复制代码 代码如下:
<script type="text/javascript"> String.prototype.replaceAll = stringReplaceAll; function stringReplaceAll(AFindText,ARepText){ var raRegExp = new RegExp(AFindText.replace(/([\(\)\[\]\{\}\^\$\+\-\*\?\.\"\'\|\/\\])/g,"\\$1"),"ig"); return this.replace(raRegExp,ARepText); } var ssString="www.cnlei.com;www.CnLei.net;www.cnlei.org"; alert(ssString.replaceAll("cnlei","iecn")); ssString="www.${MyName}.com;www.${MyName}.net;www.${MyName}.org"; alert(ssString.replaceAll("${MyName}","cnlei")); ssString="www.{MyName}.com;www.{MyName}.net;www.{MyName}.org"; alert(ssString.replaceAll("{MyName}","cnlei")); </script>
以前使用方法一:(可实现忽略大小,但无法实现特殊符号的替换)
复制代码 代码如下:
<script type="text/javascript"> String.prototype.replaceString = stringReplaceAll; function stringReplaceAll(AFindText,ARepText){ var raRegExp = new RegExp(AFindText,"ig"); return this.replace(raRegExp,ARepText); } var ssString="www.cnlei.com;www.CnLei.net;www.cnlei.org"; alert(ssString.replaceString("cnlei","iecn")); ssString="www.${MyName}.com;www.${MyName}.net;www.${MyName}.org"; alert(ssString.replaceString("${MyName}","cnlei")); ssString="www.{MyName}.com;www.{MyName}.net;www.{MyName}.org"; alert(ssString.replaceString("{MyName}","cnlei")); </script>
以前使用的方式二:(可替换特殊符号$等,但无法忽略大小写)
复制代码 代码如下:
<script type="text/javascript"> String.prototype.replaceString = function(s1,s2){ this.str=this; if(s1.length==0)return this.str; var idx=this.str.indexOf(s1); while(idx>=0){ this.str=this.str.substring(0, idx)+s2+this.str.substr(idx+s1.length); idx=this.str.indexOf(s1); } return this.str; } var ssString="www.cnlei.com;www.CnLei.net;www.cnlei.org"; alert(ssString.replaceString("cnlei","iecn")); ssString="www.${MyName}.com;www.${MyName}.net;www.${MyName}.org"; alert(ssString.replaceString("${MyName}","cnlei")); ssString="www.{MyName}.com;www.{MyName}.net;www.{MyName}.org"; alert(ssString.replaceString("{MyName}","cnlei")); </script>