NAME
    Data::Define - Make undef's defined

SYNOPSIS
     use Data::Define;
 
     print define undef; # prints ''

     use Data::Define qw/ brockets /;

     print define undef; # prints '<undef>';
 
     use Data::Define qw/ define_html brockets /;

     print define_html undef; # prints '&lt;undef&gt;';
 
     use Data::Define qw/ define_html div-class-undef /;

     print define_html undef; # prints '&lt;undef&gt;';
 
DESCRIPTION
    Data::Define

METHODS
  define
    This method takes one parameter and returns it defined even if it was
    not defined primordially.

    This method is exported by default.

    Default return value is ''. If you asked to export 'brockets' using
    Data::Define, return value becomes '<undef>'. You can specify your own
    default value using Data::Define->"set_undef_value".

  define_html
    This method works exactly the same as 'define', but when exporting
    'brockets', return value becomes '&lt;undef*gt;', so you can send it to
    HTML browser without need to escape.

    Additionally, you can ask to export 'div-class-undef', then return value
    will be '<div class="undef"></div>'.

    You can specify your own default value using
    Data::Define->"set_undef_value_html".

  set_undef_value( $value )
    This method allows you to specify your own default value for define.
    Usage is "Data::Define->set_undef_value( $value )".

    If $value is not defined, default value ('', or '<undef>' if 'brockets'
    is exported) is used.

  set_undef_value_html( $value )
    This method allows you to specify your own default value for
    define_html. Usage is "Data::Define->set_undef_value_html( $value )".

    If $value is not defined, default value ('', or '&lt;undef&gt;' if
    'brockets' is exported, or '<div class="undef"></div>' if
    'div-class-undef' is exported) is used.

AUTHORS
    Serguei Trouchelle <stro@railways.dp.ua>

COPYRIGHT
    Copyright (c) 2006 Serguei Trouchelle. All rights reserved.

    This program is free software; you can redistribute it and/or modify it
    under the same terms as Perl itself.