NAME once - Execute code only once throughout the program's lifetime VERSION version 1.101420 SYNOPSIS use once; sub setup { my $self = shift; ONCE { print "run only once however often setup() is called" }; # other_things(); } DESCRIPTION This module provides a way to run code only once, no matter how often the surrounding code is called. METHODS ONCE This subroutine is exported automatically. It takes a code block and executes it only the first time that this specific call of "ONCE" is encountered. This might be useful, for example, in a situation where you initialize an object but only want to do it the first time any object of that class is initialized, perhaps to install methods or setup some other data. INSTALLATION See perlmodinstall for information and options on installing Perl modules. BUGS AND LIMITATIONS No bugs have been reported. Please report any bugs or feature requests through the web interface at . AVAILABILITY The latest version of this module is available from the Comprehensive Perl Archive Network (CPAN). Visit to find a CPAN site near you, or see . The development version lives at . Instead of sending patches, please fork this project using the standard git and github infrastructure. AUTHOR Marcel Gruenauer COPYRIGHT AND LICENSE This software is copyright (c) 2009 by Marcel Gruenauer. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.