相关疑难解决方法(0)

所以我有这两个例子,来自javascript.info:

例1:

var animal = {
  eat: function() {
    alert( "I'm full" )
    this.full = true
  }
}

var rabbit = {
  jump: function() { /* something */ }
}

rabbit.__proto__ = animal 

rabbit.eat() 

例2:

function Hamster() {  }
Hamster.prototype = {
  food: [],
  found: function(something) {
    this.food.push(something)
  }
}

// Create two speedy and lazy hamsters, then feed the first one
speedy = new Hamster()
lazy = new Hamster()

speedy.found("apple")
speedy.found("orange")

alert(speedy.food.length) // 2
alert(lazy.food.length) // 2 (!??)

从示例2开始:当代码到达时 …

可能重复:
Javascript多重继承

有没有办法在JavaScript中执行此操作:

Foo = function() {

};

Bar = function() {

};

Baz = function() {
    Foo.call(this);
    Bar.call(this);
};

Baz.prototype = Object.create(Foo.prototype, Bar.prototype);

var b = new Baz();
console.log(b);
console.log(b instanceof Foo);
console.log(b instanceof Bar);
console.log(b instanceof Baz);

那么Baz既是Foo又是Bar的一个例子？

我知道如何在javascript中继承,但我只能继承一个对象.例如.

function fun1() {
this.var1=10;
this.meth1=function() {
...
...
};
}

function fun2() {
this.var2=20;
this.meth2=function() {
...
...
};
}

function fun3() {
this.var3=30;
this.meth3=function() {
...
...
};
}

现在,如果我想要一个fun3对象继承fun1对象我可以做到这一点

fun3.prototype=new fun1();

或者继承fun2对象我可以做到这一点

fun3.prototype=new fun2();

但我怎么能继承fun1和fun2？