Multi-Dimensional Hashes in Perl

Introduction To Hashes

Perl hashes are data types that allow you to associate data to a key. For example, a hash can store article titles with the date of publication as the key:

%hash = (20030227 => 'Multi-dimensional hashes', 20030113 => 'Introduction to mod_perl', 20021201 => 'The CPAN Module' );

This is a one-dimensional hash.

Multi-Dimensional Arrays in Perl

Introduction to Arrays

A Perl array is a data type that allows you to store a list of items. You create them by assigning them to an array variable. The array variable is identified by a @ prefix. To define a list of dates, we do this:

@array = ('20020701', '20020601', '20020501');


This is a one-dimensional array.