<<javascript:the good part>> Inheritance

Javascript does not have the concept of class. It is a prototyal language which means objects inherits directly from other projects.

The book introduces several ways to implement the inheritance.

1. Pseudoclassical

2. Prototypal

3. Functional

4. Parts

 

Below, I give an example of Functional inheritance, which I think is the most "javascript way".

function parent(s) {
    var name = s.name;
    var o={};
    o.getName = function(){
        return name;
    };
    return o;
}

var p=parent({name:"zhangruimin"});
console.log(p.getName());

function child(s) {
    var title = s.title; //private field
    var o=parent(s); //like call the parent constructor
    var getParentName=o.getName;// store to implement override
    var getTitle= function(){// private function
         return title;
    }
    o.getName = function(){
        return "In child: "+ getTitle()+getParentName();
    };
    return o;
}

var c=child({name:"zhangruimin", title:"MR."});
console.log(c.getName());

 

Here, we've got:

1. inheritance

2. private function and field

3. Call parent method