Yes very sure. nthbit will extract the nth bit from an integer type. The bitwise logic is the &&& and <<< in F# you use triples for bitwise. But there is a bug

Yes very sure. nthbit will extract the nth bit from an integer type. The bitwise logic is the &&& and <<< in F# you use triples for bitwise. But there is a bug in there, i forgot to times sz by 8 http://msdn.microsoft.com/en-us/library/dd469495.aspx http://msdn.microsoft.com/en-us/library/dd469495.aspx bitstream turns a sequence of integer types into a sequence of bits. So if you wanted to turn a stream into bits you'd do something like the following. new System.IO.FileStream('foo.txt') |> Seq.unfold (fun s -> (s , match s.read with | -1 -> None | x -> Some(x))) |> bitstream I just realized that the bitstream function is unnecessary and you could instead write let bits (bitContainer:'T) : seq<bool> = [0..(sizeof<'T>*8)] |> Seq.ofArray |> Seq.map (fun nth -> (bitContainer &&& ((1 :> 'T) <<<nth)) And change the above code to: new System.IO.FileStream('foo.txt') |> Seq.unfold (fun s -> (s , match s.read with | -1 -> None | x -> Some(x))) |> Seq.map bits |> Seq.concat