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//*** | |
//*X* | |
//*** | |
let vicinity (cx, cy) = | |
seq { | |
for x in -1..1 do | |
for y in -1..1 do | |
yield (cx + x, cy + y) | |
} |> Seq.filter (fun c -> c <> (cx, cy)) | |
let contains' element world = | |
Seq.exists (fun c -> c = element) world | |
let contains element = | |
Seq.exists (fun c -> c = element) | |
// Seq.exists ((=) element) | |
let shouldBeAlive world (cell, ns) = | |
match ns with | |
| 3 -> true | |
| 2 when world |> contains cell -> true | |
| _ -> false | |
(* 111 | |
x 212 | |
x ->212 | |
111 | |
*) | |
let next world = | |
let world' = world |> Seq.toList | |
world' | |
|> Seq.collect vicinity | |
|> Seq.groupBy id | |
|> Seq.map (fun (c, v) -> (c, Seq.length v)) | |
|> Seq.filter (shouldBeAlive world') | |
|> Seq.map fst | |
let sampleWorld = seq { | |
// Glider | |
yield (2, 0) | |
yield (2, 1) | |
yield (2, 2) | |
yield (1, 2) | |
yield (0, 1) | |
// Line | |
yield (20, 3) | |
yield (20, 4) | |
yield (20, 5) | |
} | |
let display' width height world = | |
System.Console.SetCursorPosition(0,0) | |
seq { | |
for x in 1..(height+1) do | |
for y in 1..width do | |
yield (x,y) | |
} | |
|> Seq.iteri (fun i c -> | |
match c with | |
| c when world |> contains c -> printf "X" | |
| _ -> printf "." | |
if (i+1) % width = 0 then printfn "" | |
) | |
|> ignore | |
let display = display' 50 25 | |
System.Console.Clear() | |
let iterations = 100 | |
seq { 1 .. iterations } | |
|> Seq.fold ( fun world n -> | |
display world | |
printfn "%A/%A" n iterations | |
System.Threading.Thread.Sleep(50) | |
next world | |
) sampleWorld |
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