perlref - Perlのリファレンスとネストしたデータ構造 - perldoc.jpThis is complete documentation about all aspects of references. For a shorter, tutorial introduction to just the essential features, see perlreftut. Before release 5 of Perl it was difficult to represent complex data structures, because all references had to be symbolic--and even then it was difficult to refer to a variable instead of a symbol table entry. Perl now not only makes it easier to use
