Perl by Example

Chapter 12. Does This Job Require a Reference?

By the time you finish this chapter, you will understand the following Perl statements:

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use Data::Dumper;use warnings;use strict;my $student={ "Name"=>undef,              "Major"=>undef,              "Courses"=>[],              "Stats"=>{},            };$student->{"Courses"}=[ qw( French Algebra Chemistry ) ];$student->{"Stats"}->{"PointAve"}=3.5;$student->{"Stats"}->{"StartDate"}="09/17/12";print Dumper $student;

12.1 What Is a Reference?

You have a post office box where you receive mail. The address on a letter contains a reference to your mailbox. The postman goes ...