Or consider using a set/map instead so you always have distinct items...
>> Because lists are immutable...
That does make sense; I hadn't considered that aspect. Thanks.
-Neil
Because lists are immutable, you can't get distinct items w/o allocating a new list (ok - you could share a tail in some cases...), so you don't lose much by using Seq.Distinct and doing a |> ToList.
(Of course, if List.Distinct is really what you want and it's in a 4-nested loop in your engine, then you should probably code one that as efficient as possible.)
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(I'm sure this has probably been covered before; I did look for it, but I couldn't find anything.)
What is the rationale for not providing a List.distinct, but rather requiring a round trip through Seq or Seq (or custom code)? It seems such an obvious omission that there must be some reason for it.
Is it just that it's redundant and simple to synthesize, or is it something more profound?
-Neil
p.s. The five-year-old kid in me feels better about things I can't have if I know the reason, lol.