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[Java教程]js实现StringBuffer


实现

function StringBuffer() {  this.__strings__ = [];};StringBuffer.prototype.Append = function (str) {  this.__strings__.push(str);  return this;};//格式化字符串StringBuffer.prototype.AppendFormat = function (str) {  for (var i = 1; i < arguments.length; i++) {    var parent = "\\{" + (i - 1) + "\\}";    var reg = new RegExp(parent, "g")    str = str.replace(reg, arguments[i]);  }  this.__strings__.push(str);  return this;}StringBuffer.prototype.ToString = function () {  return this.__strings__.join('');};StringBuffer.prototype.clear = function () {  this.__strings__ = [];}StringBuffer.prototype.size = function () {  return this.__strings__.length;}

 

实例化调用

var sbHtml=new StringBuffer();sbHtml.Append('hello');sbHtml.Append('world');  console.log(sbHtml.ToString());