F#
let diff a b = a |> Array.filter (fun v -> not (b |> Array.contains v))
also sequence expression syntax
let diff a b = [| for value in a do if not (b |> Array.contains value) then yield value |]
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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F#
also sequence expression syntax
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.