继承的4种基本方式

function Parent(){
this.name = "Parent";
}
function Child(){
Parent.call(this);
}
var child = new Child();
console.log(child.name);

function Parent(){
this.name = "Parent";
}
function Child(){
}
Child.prototype = new Parent();
var child = new Child();
console.log(child.name);

function ArrayCollection(){
return [];
}

var ac = new ArrayCollection();