// base.js
'use strict';

export default class BaseClass {
    set job ( job ) {
        this._job = job;
    }

    get personData () {
        return {
            name: `${this._last}, ${this._first}`,
        job: this._job
    }
}

// classes.js
'use strict';

import BaseClass from './base';

export default class PersonClass extends BaseClass {
    constructor( first = 'John', last = 'Doe' ){
        super( );

        this._first = first;
        this._last  = last;
        this._job   = null;
    }
}

// app.js
'use strict';

import PersonClass from './classes';
import constant from 'lodash/utility/constant';

const John   = new PersonClass( undefined,'Hyland' );
const Justin = new PersonClass( 'Justin','Hyland' );
const Nathan = new PersonClass( 'Nathan','Hyland' );

John.job   = 'Father';
Justin.job = 'Engineer';
Nathan.job = 'Developer';

const people = {
    john:   constant(John.personData),
    justin: constant(Justin.personData),
    nathan: constant(Nathan.personData)
};

console.log( 'Johns info:',   people.john() );
console.log( 'Justins info:', people.justin() );
console.log( 'Nathans info:', people.nathan() );