Creating a Dictionary of Lists in Javascript

Unity Engine
1

Hey all,

I am trying to use a dictionary, with keys as Strings and values as Generic Lists, but I cannot work out the syntax I need to use.

The class variable is:

private var registeredListeners : Dictionary.<String, List.<BaseEventListener>>;

and the declaration in the class constructor is:

registeredListeners = new Dictionary.<String, List.<BaseEventListener>>();

which Unity really doesn’t like. I’ve tried all sorts of combinations and variations, but just can’t seem to hit on the correct syntax.

Any help would be appreciated,

Wibbs

2

If you take a look at this thread, near the end: http://forum.unity3d.com/threads/80203-can-someone-explain-to-me-why-this-does-not-work

You’ll see that you can’t do generics like that in Javascript, but if you do it in C# and use your C# code from Javascript, it’ll work.

3

No, that’s only for Unity 2.6. Generics works as expected (mostly) for JS in Unity 3.

The actual problem in this case is that for some reason whitespace makes a difference; it doesn’t like two >> in a row:

private var registeredListeners : Dictionary.<String, List.<BaseEventListener> >;

–Eric

1 Like
4

Hi,

I’ve had a look at that post, and understand the approach in principle, but I’m still having a few problems with it.

I now have a class as follows:

using UnityEngine;
using System.Collections.Generic;

public static class GenericList {
	public static List<BaseEventListener> EventListenerList ()
	{
		return new List<BaseEventListener>();
	}
}

However, it does not seem to recognise the BaseEventListener type, which is defined in a seperate JS file.

Also, assuming I can get this approach to work, how would I declare the class variable I want…

private var registeredListeners : Dictionary.<String, what goes here?>

Thanks for your help so far,

Wibbs

5

Don’t bother with any of that; it’s not going to work here because of compilation order issues and isn’t necessary anyway. See my post above.

–Eric

6

Thank you very much - there is no way I would have ever figured that out :slight_smile: