Check if an element is within a sequence

Question

how to check if an element is contained within a sequence? I expected some Seq.contains, but i could not find it. Thanks

EDIT: Or, for an easier tas

Answer 1

Seq.exists again, but with slightly different syntax -

let testseq = seq [ 1; 2; 3; 4 ]
let testn = 2
testseq |> Seq.exists (fun x -> x = testn)

See MSDN F#: Seq.exists function: https://msdn.microsoft.com/en-us/library/ee353562.aspx

Lots of other good ones there too!