Js实现StringBuilder

Js实现StringBuilder

在IE中大量字符串相加很浪费效率，用StringBuilder可以解决

 

function StringBuilder()
{
   this.data=Array("");
}

StringBuilder.prototype.Append=function()
{
   this.data.push(arguments[0]);
}

StringBuilder.prototype.toString=function()
{
   return this.data.join("");
}

var xx=new StringBuilder();
xx.Append("1 ");
xx.Append("2 ");
xx.Append("3");
var tmp=xx.toString();
alert(tmp);