Functional Inheritance

functional.js

var person = function(spec){
    var that = {};

    that.getName = function(){
        return spec.name;
    };

    that.getSex = function(){
        return spec.sex;
    };

    return that;
};


var developer = function(spec){
    var that = person(spec);

    that.getLanguage = function(){
        return spec.language;
    };

    that.getExperience = function(){
        return "Years of experience : " + spec.experience;
    };

    return that;
};