add helpers to determine if globals (or table fields) are specific types

[ehrhart]

I'd like to know if it's possible to check if a global function exists before doing invokeFunction or invokeVoidFunction.

If I try to call a function that doesn't exist, the stack keeps getting filled with "`attempt to call a nil value'" Any ideas on how to prevent this?

Thanks

[Tomasu]

Well, the invoke methods really should be poping the errors back off the lua stack. but I could add a globalExists or similar method.

[Tomasu]

Now it wont fill the stack with junk, but you can also now check if a global exists via globalExists, it does not check its type, rather that the global is not nil. I may think about adding a couple helpers that check if its a function or table, etc, as well.

[ehrhart]

Thanks a lot, works like a charm. Some helpers would be useful for sure, but globalExists helps a lot already