Help me to explain the F# Matrix transpose function
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by Kev
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Published on 2010-06-10T16:00:08Z
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2010/06/10
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F#
There is a Matrix transpose function:
let rec transpose = function
| (_::_)::_ as M -> List.map List.head M :: transpose (List.map List.tail M)
| _ -> []
[[1; 2; 3]; [4; 5; 6]; [7; 8; 9]] |> transpose |> printfn "%A"
It works fine.
What does ( _ :: _ ) :: _ mean?
I don't understand the whole code!
Who can explain it?
Thank You!
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