《javascript设计模式》学习笔记二：Javascript面向对象程序设计继承用法分析

function person(name){
  this.name = name;
}
extend(author, person);
function extend(subclass, superclass){
 var f= function(){};
 f.prototype = superclass.prototype;//f.prototype.constructor = superclass
 subclass.prototype = new f();//这里调用的实际上是superclass()，这样subclass.prototype.construcor = superclass
 subclass.prototype.constructor = subclass;//将subclass的构造函数改写为正常的自身的构造函数
}

var person ={}
var author = clone(person);
function clone(obj){
 function F(){};
 F.prototype = obj;
 return new F;
}

var person = {};
augment(author, person);

//参数最少两个，超过两个则表示指定要继承的成员
function augment(receivingclass, givingclass){
  if(arguments[2]){
   for(var i=2;i<arguments.length;i++){
    receivingclass.prototype[arguments[i]] = givingclass.prototype[arguments[i]];
   }
  }
  else{
   for(methodname in givingclass.prototype){
    receivingclass.prototype[methodname] = givingclass.prototype[methodname];
   }
  }
}