Learning Perl Objects, References amp;amp; Modules [Electronic resources] نسخه متنی

Chapter 4. References and Scoping

References can be copied and passed around
like any other scalar. At any given time, Perl knows the number of
references to a particular data item. Perl can also create references
to anonymous data structures (structures that
do not have explicit names) and create references automatically as
needed to fulfill certain kinds of operations. Let's
look at copying references and how it affects scoping and memory
usage.