null instead of ==

Question

I have just started to learn Haskell out of interest. I follow learnyouahaskell.com.

There I found this:

null checks if a list is emp

Answer 1

In my opinion, null myList reads more naturally than myList == [].

But the raison d'être for null is that it can be used as a function. For example, here's a function that takes a list of lists, and returns only the nonempty ones:

nonemptyLists :: [[a]] -> [[a]]
nonemptyLists = filter (not . null)

Without null, this would be more awkward:

nonEmptyLists = filter ([] /=)