file::find::object::rule::procedural(3pm) [debian man page]

File::Find::Object::Rule::Procedural(3pm)		User Contributed Perl Documentation		 File::Find::Object::Rule::Procedural(3pm)

NAME

       File::Find::Object::Rule::Procedural - File::Find::Object::Rule's procedural interface

SYNOPSIS

	 use File::Find::Object::Rule;

	 # find all .pm files, procedurally
	 my @files = find(file => name => '*.pm', in => @INC);

DESCRIPTION

       In addition to the regular object-oriented interface, File::Find::Object::Rule provides two subroutines for you to use.

       "find( @clauses )"
       "rule( @clauses )"
	   "find" and "rule" can be used to invoke any methods available to the OO version.  "rule" is a synonym for "find"

       Passing more than one value to a clause is done with an anonymous array:

	my $finder = find( name => [ '*.mp3', '*.ogg' ] );

       "find" and "rule" both return a File::Find::Object::Rule instance, unless one of the arguments is "in", in which case it returns a list of
       things that match the rule.

	my @files = find( name => [ '*.mp3', '*.ogg' ], in => $ENV{HOME} );

       Please note that "in" will be the last clause evaluated, and so this code will search for mp3s regardless of size.

	my @files = find( name => '*.mp3', in => $ENV{HOME}, size => '<2k' );
							   ^
							   |
		      Clause processing stopped here ------/

       It is also possible to invert a single rule by prefixing it with "!"  like so:

	# large files that aren't videos
	my @files = find( file	  =>
			  '!name' => [ '*.avi', '*.mov' ],
			  size	  => '>20M',
			  in	  => $ENV{HOME} );

AUTHOR

       Richard Clamp <richardc@unixbeard.net>

COPYRIGHT

       Copyright (C) 2003 Richard Clamp.  All Rights Reserved.

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

SEE ALSO

       File::Find::Object::Rule

perl v5.14.2							    2012-05-05				 File::Find::Object::Rule::Procedural(3pm)

File::Find::Rule::Extending(3)				User Contributed Perl Documentation			    File::Find::Rule::Extending(3)

NAME

       File::Find::Rule::Extending - the mini-guide to extending File::Find::Rule

SYNOPSIS

	package File::Find::Rule::Random;
	use strict;

	# take useful things from File::Find::Rule
	use base 'File::Find::Rule';

	# and force our crack into the main namespace
	sub File::Find::Rule::random () {
	    my $self = shift()->_force_object;
	    $self->exec( sub { rand > 0.5 } );
	}

	1;

DESCRIPTION

       File::Find::Rule went down so well with the buying public that everyone wanted to add extra features.  With the 0.07 release this became a
       possibility, using the following conventions.

   Declare your package
	package File::Find::Rule::Random;
	use strict;

   Inherit methods from File::Find::Rule
	# take useful things from File::Find::Rule
	use base 'File::Find::Rule';

       Force your madness into the main package

	# and force our crack into the main namespace
	sub File::Find::Rule::random () {
	    my $self = shift()->_force_object;
	    $self->exec( sub { rand > 0.5 } );
	}

       Yes, we're being very cavalier here and defining things into the main File::Find::Rule namespace.  This is due to lack of imaginiation on
       my part - I simply can't find a way for the functional and oo interface to work without doing this or some kind of inheritance, and
       inheritance stops you using two File::Find::Rule::Foo modules together.

       For this reason try and pick distinct names for your extensions.  If this becomes a problem then I may institute a semi-official registry
       of taken names.

   Taking no arguments.
       Note the null prototype on random.  This is a cheat for the procedural interface to know that your sub takes no arguments, and so allows
       this to happen:

	find( random => in => '.' );

       If you hadn't declared "random" with a null prototype it would have consumed "in" as a parameter to it, then got all confused as it doesn't
       know about a '.' rule.

AUTHOR

       Richard Clamp <richardc@unixbeard.net>

COPYRIGHT

       Copyright (C) 2002 Richard Clamp.  All Rights Reserved.

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

SEE ALSO

       File::Find::Rule

       File::Find::Rule::MMagic was the first extension module, so maybe check that out.

perl v5.18.2							    2011-09-19					    File::Find::Rule::Extending(3)