pd example

OO-ified.js

// persons modules
// uses pd - http://raynos.org/blog/17/Improving-ES5-OO-with-pd
var Person = {
    fullName: function _fullName() {
        return this.firstName + " " + this.lastName; 
    },
    age: function _age() {
        return (new Date).getYear() - this.birthDate.getYear();
    },
    saySomething: function _saySomething() {
        return this.foo;    
    },
    constructor: function _construct(hash) {
        hash.foo = hash.foo || "bar";
        pd.extend(this, hash);
    }
};

var FitnessAddict = pd.make(Person, {
    bmi: function _bmi() {
        return this.weight / (this.height * this.height); 
    },
    isWeightNormal = function _isWeightNormal() {
        var bmi = this.bmi();
        if (bmi > 25 || bmi < 18.5) {
            return false;
        }
        return true;
    }
});
    
module.exports = {
    FitnessAddict: FitnessAddict        
};

use-it.js

var FitnessAddict = require("persons").FitnessAddict;

var fa = pd.beget(FitnessAddict, {
    firstName: "Bar",
    lastName: "Baz",
    birthYear: new Date(1990,5,5),
    weight: 80,
    height: 1.8
});
    
fa.isWeightNormal(); // true
fa.saySomething(); // "bar"
fa.fullName(); // "Bar Baz"