Comment by rnhmjoj

The problem with working with strings in Haskell is that there are too many datatypes: Data.Text, Data.Text.Lazy, Data.ByteString Data.ByteString.Char8, Data.ByteString.Lazy, Data.ByteString.Lazy.Char8. All of them share the same function names so you have to do imports like

    import qualified Data.ByteString as BS
    import qualified Data.Text.Lazy as TL
    import qualified Data.Text as TS

and somehow the library you need always use a different ByteString variant from the one you already chose so you have to pack/unpack here and there. There should be a way to make `length`, `map` and all work on every string type. Maybe a type class or some better idea is needed.

By the way the link to the caesar cipher is broken.