Generating all tuples (Haskell)

From LiteratePrograms

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This is a simple example of the tuples generation algorithm, written in Haskell.

see The Art of Computer Programming (TAOCP) Volume 4 Fascicle 2, Generating All Tuples and Permutations (2005), ISBN 0-201-85393-0

Algorithm M

The generation function is genTuplesM as below:

• Input parameter: we list the limits on each bit into a list as an input
• Output: generating all possible tuples

<<genTuplesM.hs>>=
module Main where
genTuplesM :: [Int] -> [[Int]]
genTuplesM = mapM (\b -> [1..b])
genTuplesM [3,5,3,2]

Test

Just load the file genTuplesM.hs in GHC, execute it and you will get the result.

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