Information on globs: Dominus is your friend, his Perl Hardware Store is where you want to shop, you will learn about globs and about tons of other funky stuff.

As far as searching it is pretty difficult to search for glob because of the glob function which gets in the way, so you will have to use typeglob instead, and the usual methods, Super Search is pretty good here and Google work too.

Don't forget perldoc perldata (an HTML version is here) but youshould learn how to use perldoc anyway.