[Haskell-beginners] Reversing the lines read from stdin

Tim Perry perry2of5 at yahoo.com
Thu Jan 28 15:44:04 EST 2010

I wrote a simple program: it reads the contents from standard in and reverses the order of the lines. I imagine there are many cleaner ways to do this. Anybody willing to post some rewrites?


main = interact reverseFile
reverseFile s = unlines $ lines $ foldr combineStr [] (lines s) 
combineStr s1 s2 = s2 ++ "\n" ++ s1
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