abstract

Abstract

Abstract class may contain a mix of methods declared with or without an implementation. It cannot be instantiated, but they can be subclassed.

How to use

Import

You can use import with es6 import:

import { Abstract } from 'arkitect.js';

Or use required syntax:

var arkitect = require('arkitect.js');
var Abstract = arkitect.Abstract;

Examples

Custom abstract class creation:

class MyAbstract extends Abstract {

 constructor(value){
    super();
    this._value = value;
 }

 compute(){
   return this._value * 2;
 }
}

Other class creation:

class Instantiable extends MyAbstract {
   compute(){
     return super.compute() + this._value;
   }
}

Instantiation:

const a1 = new Abstract(4);         /* Throws an error. Constructor of Abstract
                                       class is not usable directly */
const a2 = new MyAbstract(4)        /* Throws an error. Cannot instantiate
                                       Abstract class */
const a3 = new Instantiable(4);     /* Create an instance of Instantiable */
a3.compute()                        /* Returns 12 */