2 replies to this topic

[Guenhwyvar]

Hiya,

I really need help ASAP on the one. I have a list (_,Index) where the index's are '2, 4,6, 7, 9, 10, 13,' and I need to return all the index's that are consecutive.There is no way to loop properly in haskell and I cant think of a way. Ie 6 7,9 and 10 are consecutive so I want to return (_,6),(_7),(_,9),(_10). .

Thanks

[WingedPanther]

You'll have to use a recursive solution, where you return the current portion along with whatever the next recursive call returns.

[Sysop_fb]

List comprehension is pretty easy in haskell unless I'm misunderstanding your question

ghci> let indexs = [2, 4, 6, 7, 9, 10, 13]
ghci> [(x, y) | x <- indexs, y <- tail indexs, (x + 1) == y]

[(6,7),(9,10)]