Add shortLenghts

short_lengths.hs

@@ -0,0 +1,11 @@
+shortLengthsRecur :: [String] -> Int
+shortLengthsRecur [] = 0
+shortLengthsRecur (x : xs) = if l <= 5 then l + shortLengthsRecur xs else shortLengthsRecur xs
+  where
+    l = length x
+
+shortLengthsListComp :: [String] -> Int
+shortLengthsListComp i = sum [if length x <= 5 then length x else 0 | x <- i]
+
+shortLengthsMapFilterFold :: [String] -> Int
+shortLengthsMapFilterFold i = foldr (+) 0 (map length (filter (\e -> length e <= 5) i))