How to define a node that accepts a predicate

[Mearman]

There are several cases I'd like to know this for, but right now, I'm trying to replicate Array.filter() for the new utility kit.
With the current tooling, what is the best way to pass a predicate (or predicates) to a node?
And I suppose, in general, how can I specify the signature of the board to be passed as a parameter?

[aomarks]

Good question! It sounds like this pattern would be a variation of or wrapper around a call to code. code isn't yet supported in the new build package, but adding it is very high on my todo list, so if you give me a few days I'll come back with something you should be able to work with.

[Mearman]

I was thinking that. But then I thought it'd be even better to also be able to define the signature of a board to be passed in then it could be a code node or any other implementation?