15 lines
319 B
Haskell
15 lines
319 B
Haskell
module Misc where
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import Data.List (tails)
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withCoords :: [[a]] -> [((Int, Int), a)]
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withCoords grid = [((r, c), a) | (r, row) <- zip [0..] grid, (c, a) <- zip [0..] row]
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pairs :: [a] -> [(a, a)]
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pairs [] = []
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pairs xs = zip xs $ tail xs
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paired :: [a] -> [(a, a)]
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paired xs = [(x, y) | (x:ys) <- tails xs, y <- ys]
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