Or (although it will also remove duplicates from a):
(a |> Set.ofSeq) - (b |> Set.ofSeq)
Yes, this was my first thought, but I was trying to retain dupes.
Just define the subtraction operator and done.
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Or (although it will also remove duplicates from a):
Yes, this was my first thought, but I was trying to retain dupes.
Just define the subtraction operator and done.