javascript字符串连接类代码一例

//自定义的一个字符串连接类，用于拼接字符串，比"+"要提升性能
function StringBuffer() {
                this._strs = new Array();
}
StringBuffer.prototype.append = function(str) {
                this._strs.push(str);
};
StringBuffer.prototype.arrayToString = function() {
                return this._strs.join("");
};
 

var strBuff=new StringBuffer();
strBuff.append("hello,");
strBuff.append("Welcome to javascript!");

alert(strBuff.arrayToString());