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  1. let rec subset l =
  2.     match l with
  3.     | [] -> [[]]
  4.     | (x::xs) -> let second = subset xs in [for y in second -> x::y] @ second
  5.  
  6. let set = [1;2;3;4]
  7.  
  8. subset set |> printfn "%A"
Success #stdin #stdout 0.2s 26528KB
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Standard input is empty
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[[1; 2; 3; 4]; [1; 2; 3]; [1; 2; 4]; [1; 2]; [1; 3; 4]; [1; 3]; [1; 4]; [1];
 [2; 3; 4]; [2; 3]; [2; 4]; [2]; [3; 4]; [3]; [4]; []]
https://ideone.com/7mhrcu
language:
F# (mono 4.1)
created:
10 years ago
visibility:
secret

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