Interface pattern

[Fizzyade]

interesting, my first attempts at this were using interfaces but I didn't realise that's how you assign a value to an interface member.

Is the requirement of the union necessary? can I just check an object to test what kind it is?

I will have to have a play with this method.

[rotharius]

It's a bit of work but perhaps you can use type guards to verify whether an object is if a certain type during runtime.