Home/ Questions/Q 1096639
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-17T00:18:42+00:00

Here’s some question about oop in js (questions in the code below). <html> <script>

  • 0

Here’s some question about oop in js (questions in the code below).

<html>
    <script>
    function A(){
      a = 'a - private FROM A()';
      this.a = 'a - public FROM A()';
      this.get_a = function(){
        return a;
      }
    }

    function B(){
      this.b = 'b - private FROM B()';
      this.a = 'a - public FROM B() ';
    }

    C.prototype = new A();
    C.prototype = new B();
    C.prototype.constructor = C;
    function C() {
      A.call(this);
      B.call(this);
    }

    var c = new C();

    //I've read paper about oop in Javacscript but they never talk 
    //(the ones have read of course) about multiple inheritance, any 
    //links to such a paper?

    alert(c.a);
    alert(c.b);
    alert(c.get_a());

    //but

    //Why the hell is variable a from A() now in the Global object?
    //Look like C.prototype = new A(); is causing it.

    alert(a);

    </script>
</html>
Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    You need to declare the variable a with the var statement in order to make it local to the function.

    function A(){
  var a = 'a - private FROM A()';
  this.a = 'a - public FROM A()';
  this.get_a = function(){
    return a;
  };
}
    • 0