JavaScript

双字节字符串处理
- Toggle line numbers
```
   1 String.prototype.leftB=function(len){
   2 　　var s=this.replace(/\*/g," ").replace(/[^\x00-\xff]/g,"**")
   3 　　return this.slice(0,s.slice(0,len).replace(/\*\*/g," ").replace(/\*/g,"").length)
   4 }
   5 String.prototype.lenB=function(){
   6 　　return this.replace(/\*/g," ").replace(/[^\x00-\xff]/g,"**").length
   7 }
   8 str="hi,我是中国人"
   9 alert("原始字符串："+str+"\n字符串长度："+str.length+"\n双字节长度："+str.lenB()+"\n前10位字节："+str.leftB(10))
```

HoLin/JavaScript (last edited 2009-12-25 07:12:30 by localhost)