Equality for nested dictionaries

[vader1986]

[Equatable] public sealed partial record StupidData( [property:UnorderedEquality] Dictionary<int, Dictionary<string, int>> NestedValues);

Maybe the UnorderedEquality attribute could have an optional parameter (not sure about the name) to whether or not to apply it to nested collection types.

[diegofrata]

Hi Tim! Do you mean you want to only compare keys?

[vader1986]

Sorry no I meant, I want to compare the dictionaries inside of the dictionary by their keys & values (kind of recursively). Or is that the default behaviour already?

[vader1986]

using Generator.Equals;

var stupidData1 = new StupidData(new Dictionary<int, Dictionary<int, int>>
{
    [1] = new() { [2] = 3 },
    [4] = new() { [5] = 6 }
});

var stupidData2 = new StupidData(new Dictionary<int, Dictionary<int, int>>
{
    [1] = new() { [2] = 3 },
    [4] = new() { [5] = 6 }
});

Console.WriteLine("Is stupid data equal? " + (stupidData1 == stupidData2));

[Equatable]
public sealed partial record StupidData(
    [property:UnorderedEquality]
    Dictionary<int, Dictionary<int, int>> Data);

Hope that example makes more sense. I would like both to be equal :D

[diegofrata]

@vader1986 Ah now I understand what you mean! That's currently not supported out of the box, but definitely something worth investigating.

In the mean time, you can use [CustomEquality] and create your own comparer leveraging Generator.Equals.Runtime. DictionaryEqualityComparer.

You should be able to knock something out in a few lines that does what you want.