Filtered array memoization? about memoizee HOT 3 CLOSED

@peteruithoven yes, it's not perfectly documented, but it's possible to provide custom normalizer function. It's function that should return an unique id for received arguments, and on that basis internal logic will decide whether given case was memoized or not.

In your case it might work well if done as follows:

var memoized = memoize(getSelectedObjectsTransform, {
  normalizer: function (args) {
    var state = args[0];
    return JSON.stringify(state);
  }
});

I'm closing it, as it's not a bug report or feature request

from memoizee.

@medikoo Thanks for the idea, but that doesn't really use the benefit of immutable data? I'd like to find a solution without a JSON.stringify(). I'm afraid the id will get very big, when I have a lot of data, I'm not sure what kind of negative impacts that would have.

from memoizee.

@peteruithoven in any case unique string id needs to be resolved. If you know the way how to make it short, just do it :) I don't know internal implications of your project, so it's hard for me to help you more on that case.

Alternatively if for same state structures always same object instances are passed, then you do not need to provide any normalizers, as by default memoization works by checking whether objects are equal, resolved ids are very short in that case.

from memoizee.