//扩展对象的count方法Object.prototype.count = ( Object.prototype.hasOwnProperty(‘__count__’) ) ? function () { return this.__count__; } : function () { var count = 0; for (var i in this) if (this.hasOwnProperty(i)) { count ++; } return count; }; //使用var myObj = { name1: “value1″, name2: “value2″}; alert(myObj.count());
原标题:[笔记]JavaScript获得对象属性个数的方法
关键词:JavaScript