aparler/RosettaCodeData
1
0
Fork 0
Code Issues 12 Pull requests 3 Projects Releases Packages Wiki Activity Actions

Initial data commit

Browse source
This commit is contained in:
Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 72d218235f
commit f23f22d71c
199087 changed files with 3378941 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

9
Task/Forward-difference/F-Sharp/forward-difference.fs Normal file
View file

@ -0,0 +1,9 @@
let rec ForwardDifference input n =
match n with
| _ when input = [] || n < 0 -> [] // If there's no more input, just return an empty list
| 0 -> input // If n is zero, we're done - return the input
| _ -> ForwardDifference // otherwise, recursively difference..
(input.Tail // All but the first element
|> Seq.zip input // tupled with itself
|> Seq.map (fun (a, b) -> b-a) // Subtract the i'th element from the (i+1)'th
|> Seq.toList) (n-1) // Make into a list and do an n-1 difference on it