A good answer from the perlfaqs, stefan_k++. Just let me mention in this context the nice search feature of perldoc again, the easiest way (and probably the way you did it) to find this:
perldoc -q here.*doc
This looks in all faqs for the regular expression /here.*doc/. And for completeness sake, this is how you search for the doc of a perl function (e.g. map):
perldoc -f map