What is the difference between the collection functions associateWith() and associateBy()?

associateWith() creates a map where the keys are elements of the original collection, and the values are the result of applying a transformation to EACH element.

associateBy() creates a map where the keys are the result of applying a transformation to EACH element of the original collection, and the values are the elements themselves (or the result of another transformation of the element).

In case of key conflicts, both functions take the last element corresponding to the key.