Sudoku: Difference between revisions
Content added Content deleted
(Added backtrack F# solution) |
m (→{{header|F_Sharp|F#}}: Tidied up indexing indentation) |
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[for s in squares do s, [| for u in unitList do if u |> Array.contains s then u |] ] |> Map.ofSeq |
[for s in squares do s, [| for u in unitList do if u |> Array.contains s then u |] ] |> Map.ofSeq |
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/// |
/// Dictionary of all peer squares in the relevant units wrt square in question |
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let peers = |
let peers = |
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[for s in squares do units[s] |> Array.concat |> Array.distinct |> Array.except [s] |> tuple2 s] |> Map.ofSeq |
[for s in squares do units[s] |> Array.concat |> Array.distinct |> Array.except [s] |> tuple2 s] |> Map.ofSeq |
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let solve grid = grid |> parseGrid >>= backtrack (Some "A1") |
let solve grid = grid |> parseGrid >>= backtrack (Some "A1") |
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</lang> |
</lang> |
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'''Usage:''' |
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<lang fsharp>open System |
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open SudokuBacktrack |
open SudokuBacktrack |
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let puzzle = "000028000800010000000000700000600403200004000100700000030400500000000010060000000" |
let puzzle = "000028000800010000000000700000600403200004000100700000030400500000000010060000000" |
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puzzle |> printfn "Puzzle:\n%s" |
puzzle |> printfn "Puzzle:\n%s" |
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puzzle |> parseGrid |> prettyPrint |> printfn " |
puzzle |> parseGrid |> prettyPrint |> printfn "Formatted:\n%s" |
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puzzle |> solve |> prettyPrint |> printfn "Solution:\n%s" |
puzzle |> solve |> prettyPrint |> printfn "Solution:\n%s" |
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Console.ReadKey() |> ignore |
Console.ReadKey() |> ignore |
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0</lang> |
0</lang> |
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Output<pre> |
{{Output}}<pre> |
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Puzzle: |
Puzzle: |
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000028000800010000000000700000600403200004000100700000030400500000000010060000000 |
000028000800010000000000700000600403200004000100700000030400500000000010060000000 |
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|>List.iter(fun (_,n)->n|>Seq.fold(fun z ((_,g),v)->[z..g-1]|>Seq.iter(fun _->printf " |");printf "%s|" v; g+1 ) 0 |>ignore;printfn "") |
|>List.iter(fun (_,n)->n|>Seq.fold(fun z ((_,g),v)->[z..g-1]|>Seq.iter(fun _->printf " |");printf "%s|" v; g+1 ) 0 |>ignore;printfn "") |
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</lang> |
</lang> |
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'''Usage:''' |
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===Demonstration=== |
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Given sud1.csv: |
Given sud1.csv: |
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<pre> |
<pre> |
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