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IEnumerable keys doesn't work

See original GitHub issue

Hi there! thanx for awesome project! It makes my unity development much easier 🎉

well, I’m trying to create GenericDictionary<string[], string> in my project, however it doesn’t work - reffering to the key always returns KeyNotFound exception. Atm, I’m working it around by using this code:

           foreach (var key in myDict.Keys)
                if (key.SequenceEqual(query))
                {
                    Debug.Log("query found");
                }

but it would be nice to have it in the package

Issue Analytics

State:
Created 2 years ago
Comments:7 (5 by maintainers)

Top GitHub Comments

1reaction

upscalebabycommented, Apr 18, 2022

Quick follow up.

I’ve found that it’s quite easy to check if the key is enumerable (serializedProperty.isArray) - but this flag is true for strings, so I’m wary that there are other properties that behave this way.

Currently the best solution for having enumerable keys would probably be to create a class and override the Equals and GetHashCode methods to get the desired behavior. This way the user can choose, with the drawback of added ceremony whenever enumerable keys with value based comparisons are desired.

I’ll be digging a bit deeper though so will leave this issue opened.

0reactions

upscalebabycommented, Apr 4, 2022

I tested this out some more and see what you mean, looking in the inspector it seems logical that enumerable keys should be value based rather than reference based (notice there’s no warning about duplicate keys):

I’m not sure if there are edge cases where you do want reference based enumerable types though so I’m investigating this closer.

Regardless it seems the dictionary key lookup would go from ~O(1) to O(N) when using enumerable key types, but I suppose there’s no way around that?

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