Logesh Pillay wrote: > I found the following code on the web > > /-- Andrew Bromage > / > /-- If you're doing permutations, then I suppose you want this too: > //-- (subLists might be a more suggestive name) > /combinations *:: [a] -> [[a]] > *combinations [] = [[]] > combinations (x:xs) > = combinations xs ++ [ x:xs' | xs' <- combinations xs ] > > What does ' (apostrophe) mean? I see no reference to it in Simon > Thompson's book.
' nothing. xs' does the same as xs_, or _xs, or xs2, but it's readable. _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
