Correct syntax needed for bind() on 'this' object using class

Tue 2018.09.18

Thanks both for the quick and attentive responses.

I thought I'd found the culprit. I mistakenly used tb.setX = 42; when as @Gordon pointed out should use tb.setX(42);

Note line #6 that shows the class contents aren't getting updated

But when I run that tb.setX(42);, I'm faced with yet another error:

>var tb = new TestBind();
=TestBind: { "vX": 25 }
=25
>tb.setX = 42;
=42
>print tb.getX();
=25
>var bg = g.bind(tb);
Uncaught Error: Function "bind" not found!
 at line 1 col 12
var bg = g.bind(tb);
           ^
>print bg
=undefined
>tb.setX(42);
Uncaught Error: Expecting a function to call, got Number
 at line 1 col 4
tb.setX(42);
   ^
>

This is why I originally used the syntax tb.setX = 42; to avoid the 'Expecting a function to call' error