haskell merge lists

To merge two lists in Haskell, you can use the ++ operator or the concat function. The ++ operator concatenates two lists together, while the concat function concatenates a list of lists into a single list.

Here is an example using the ++ operator:

mergeLists :: [a] -> [a] -> [a]
mergeLists [] ys = ys
mergeLists (x:xs) ys = x : mergeLists xs ys

And here is an example using the concat function:

mergeLists :: [[a]] -> [a]
mergeLists = concat

In the first example, the mergeLists function takes two lists as input and recursively merges them together by appending the first list to the second list.

In the second example, the mergeLists function takes a list of lists as input and uses the concat function to merge them into a single list.

You can use either of these functions depending on your specific requirements.