How to Create Protected Object Properties in JavaScript

Question

Is there a JavaScript pattern which mimics \"Protected\" object properties like what you see in languages like C++ ??

Basically, I\'d like to create an Object A whic

Answer 1

function ClassA(init)
{
    var protected = {};
    protected.prop = init * 10;
    if(this.constructor != ClassA) { return protected; }
}

function ClassB()
{
    var protected = ClassA.call(this, 5); //console.log(protected.prop);
}

//var a = new ClassA(123);
//var b = new ClassB();