Perl variables can be given nonstandard characteristics, such as persistence so that they won't be lost when you exit from a program and then start it again. There are a number of exciting things you can do with this facility, known as tieing, but you also need to be careful that the code you write is easy to understand and maintain too.

This topic is presented on public course Perl for Larger Projects

ac2	Using a tie class to force lower case
ac3	Using a tie class to force lower case
acm2	tieing a text file to a hash
acmagic	Persistant hash - NOT lost when the program exits
acnlook	Tieing a database file to a hash
acnset1	Crreating a database file through tie
acnset2	Tying a text file to a hash
alias_list	Accessing Unix's aliases database directly
allcodes	tied hash, unique key solution
aphash.pm	tie class definition - an appending hash
codes	location lookup
codes2	Place lookup without tie - variables are cas sensitive
flash.pm	Appending hash tie class definition
game	Appliaction that uses a scalar as a stack
lower.pm	Tie class to force all strings to lower case
persist	Persistant variable via a tie class
pwl2	Looking up user accounts, case insensitive
pwlook	Looking up users, case sensitive
stack.pm	Tie class that hides a stack under a scalar
textfile.pm	tie class that treats a file as a scalar
thash.pm	Tie class to access a disc file as a hash, with caching