-=head2 Garbage Collection
-
-Perl does pretty good garbage collection for you. It will automatically
-clean up lexical variables that have gone out of scope and objects whose
-references have gone away. Normally you don't need to worry about
-cleaning up after yourself, if using lexicals.
-
-However, some glue code, code compiled in C and linked to Perl, might
-not automatically clean up for you. In such cases, clean up for
-yourself. If there is a method in that glue to dispose or destruct,
-then use it as appropriate.
-
-Also, if you have a long-running function that has a large data
-structure in it, it is polite to free up the memory as soon as you are
-done with it, if possible.
-
- my $huge_data_structure = get_huge_data_structure();
- do_something_with($huge_data_structure);
- undef $huge_data_structure;
-
-=head2 DESTROY
-
-All object classes must provide a DESTROY method. If it won't do
-anything, provide it anyway:
-
- sub DESTROY { }
-
-
-
-=head2 die() and exit()
-
-Don't do it. Do not die() or exit() from a web template or module. Do
-not call C<kill 9, $$>. Don't do it.
-
-In command-line programs, do as you please.
-
-
-=head2 shift and @_
-
-Do not use @_. Use shift. shift may take more lines, but Jesse thinks it
-leads to cleaner code.
-
- my $var = shift; # right
- my($var) = @_; # ick. no
- sub foo { uc $_[0] } # icky. sometimes ok.
-
-
- my($var1, $var2) = (shift, shift); # Um, no.
-
- my $var1 = shift; # right
- my $var2 = shift;
-