I have written a function generating subsets of subset. It caused stack overflow when I use in the following way subsets [1..]. And it is "normal" behaviour when it comes to "normal" (no-lazy) languages. And now, I would like to improve my function to be lazy.
P.S. I don't understand laziness ( And I try to understand it) so perhaps my problem is strange for you- please explain. :)
P.S. 2 Feel free to say me something about my disability in Haskell ;)
subsets :: [a] -> [[a]]
subsets (x:xs) = (map (\ e -> x:e) (subsets xs)) ++ (subsets xs)
subsets [] = [[]]