September 2002
Intermediate to advanced
496 pages
10h
English
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Hashes (Associative Arrays)
This section deals with a special kind of array in Perl called a hash. Hashes, sometime called associative arrays, contain paired data. Each pair in the hash contains a key that acts as an index to a value that is associated with it. Hashes represent a simple yet powerful idea whose use makes programs more efficient and maintainable.
Hash Functionality
In this section we explore the functionality built into Perl for manipulating hashes. We start with an example hash that maps rock groups to their lead singers. See the folder Groups.
% type groups.pl # # groups.pl # %groups = ( U2 => Bono, Stones => "Mick Jagger", Aerosmith => "Steve Tyler", Heartbreakers => "Tom Petty", Journey => "Steve Perry", Queen => "Freddie ...