Combine filters

[peteruithoven]

Is there an easy way to combine multiple filter functions together?
I noticed I was writing one function which performed 3 filters and I couldn't easily combine the existing helper filter functions. What if we create a combine function, something like below, that checks all filters:

undoable(reducer, { filter: combineFilters(distinctState(), excludeAction(SOME_ACTION)) });

This, for edge cases, also allows usage inside a custom undoFilter:

undoable(reducer, { filter: undoFilter });
function undoFilter(action, currentState, previousState) {
  let filter = combineFilters(distinctState(), excludeAction(SOME_ACTION))(action, currentState, previousState);
  if(!filter) return filter; 
  // more filters
}

[omnidan]

@peteruithoven you're right, this is not currently possible. However, on the latest release beta4, there is no need for distinctState() anymore. Might be interesting as a helper though.

[peteruithoven]

It's mostly for when you want to combine filters for exclusion and different throttling techniques for example. I'll try to work on a pull request.

[Bear-Foot]

Hello there. @peteruithoven are you up to something about this ? I'd be glad to help if you are too busy.

[peteruithoven]

I'm afraid I haven't come around to it yet, I got stuck at figuring out how the unit tests worked. But through Gitter I did see your gist and omnidan's fork, nice work!

[omnidan]

Resolved in beta7