title: Haskell ByteString readInt return type issue
body: <p>I am currently trying to understand how to handle the return type of `Maybe (Int, ByteString)' with the function Data.ByteString.Char8.readInt, I have removed the Maybe by type checking but do not understand how to further deal with the type I now have of '(Int, ByteString)'. I feel like I am probably missing something obvious and I am hoping some one could point me in the right direction. Any help is appreciated!</p>