Is perl's each function worth using?

Question

From perldoc -f each we read:

There is a single iterator for each hash, shared by all each, keys, and values

Answer 1

each is not only worth using, it's pretty much mandatory if you want to loop over all of a tied hash too big for memory.

A void-context keys() (or values, but consistency is nice) before beginning the loop is the only "workaround" necessary; is there some reason you are looking for some other workaround?