/ 
once-1.101420
River stage one • 1 direct dependent • 1 total dependent
/ once

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 http://rt.cpan.org/Public/Dist/Display.html?Name=once.

AVAILABILITY

The latest version of this module is available from the Comprehensive Perl Archive Network (CPAN). Visit http://www.perl.com/CPAN/ to find a CPAN site near you, or see http://search.cpan.org/dist/once/.

The development version lives at http://github.com/hanekomu/once/. Instead of sending patches, please fork this project using the standard git and github infrastructure.

AUTHOR

Marcel Gruenauer <marcel@cpan.org>

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.