> imranazad wrote: > > Hi, > > > > im not very good with haskell, i barely know the basics, my coursework > > requires me to genereate a vigenere square....... > > well anyway at the moment im trying to define a functin all_rotations > > which for any list returns the list of all its rotations, so far i've made > > an attempt but it only rotates once....any ideas? i dont want the complete > > solution just help thats all, much appreciated. > > > > all_rotations :: [a] -> [[a]] > > all_rotations [] = [] > > all_rotations (x:xs) = reverse (x:xs) : []
'cycle' the list, then determine all of its suffixes with 'tails' and take the first elements of each list. _______________________________________________ Haskell-Cafe mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell-cafe
