Example of public/private properties in constructors and the difference between apply/call

Constructors, apply and call

//New constructor
var cons = function(){
    var property_private = 'bye';
    this.property_public = 'see ya';
    
    //Instead of returning this, return only what needs
    //to be accessible
    return {
        property_public: this.property_public,
        method_public: function(){
            console.log(property_private);
        }
    };
}

//Instantiate object
var myCons = new cons();

//Function to apply/call
var func = function(arg1, arg2){
    console.log(arg1, arg2, this.property_public, this.property_private);
    this.method_public();
}

func.call(myCons, 'call', 'jwin');
//call jwin see ya undefined
//bye

func.apply(myCons, ['apply', 'jwin']);
//apply jwin see ya undefined
//bye