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tree::simple::visitor::breadthfirsttraversal

Tree::Simple::Visitor::BreadthFirstTraversal(3pm)	User Contributed Perl Documentation	 Tree::Simple::Visitor::BreadthFirstTraversal(3pm)

NAME

       Tree::Simple::Visitor::BreadthFirstTraversal - A Visitor for breadth-first traversal a Tree::Simple hierarchy

SYNOPSIS

	 use Tree::Simple::Visitor::BreadthFirstTraversal;

	 # create an visitor
	 my $visitor = Tree::Simple::Visitor::BreadthFirstTraversal->new();

	 # pass our visitor to the tree
	 $tree->accept($visitor);

	 # print our results
	 print join ", " => $visitor->getResults();

	 # this will print this:
	 #   1, 2, 3, 1.1, 1.2, 2.1, 3.1, 1.1.1
	 # assuming your tree is like this:
	 #   1
	 #     1.1
	 #	 1.1.1
	 #     1.2
	 #   2
	 #     2.1
	 #   3
	 #     3.1

DESCRIPTION

       This implements a breadth-first traversal of a Tree::Simple hierarchy. This can be an alternative to the built in depth-first traversal of
       the Tree::Simple "traverse" method.

METHODS

       new There are no arguments to the constructor the object will be in its default state. You can use the  "setNodeFilter" method to customize
	   its behavior.

       includeTrunk ($boolean)
	   Based upon the value of $boolean, this will tell the visitor to include the trunk of the tree in the traversal as well.

       setNodeFilter ($filter_function)
	   This method accepts a CODE reference as its $filter_function argument and throws an exception if it is not a code reference. This code
	   reference is used to filter the tree nodes as they are collected. This can be used to customize output, or to gather specific
	   information from a more complex tree node. The filter function should accept a single argument, which is the current Tree::Simple
	   object.

       visit ($tree)
	   This is the method that is used by Tree::Simple's "accept" method. It can also be used on its own, it requires the $tree argument to be
	   a Tree::Simple object (or derived from a Tree::Simple object), and will throw and exception otherwise.

       getResults
	   This method returns the accumulated results of the application of the node filter to the tree.

BUGS

       None that I am aware of. Of course, if you find a bug, let me know, and I will be sure to fix it.

CODE COVERAGE

       See the CODE COVERAGE section in Tree::Simple::VisitorFactory for more inforamtion.

SEE ALSO

       These Visitor classes are all subclasses of Tree::Simple::Visitor, which can be found in the Tree::Simple module, you should refer to that
       module for more information.

AUTHOR

       stevan little, <stevan@iinteractive.com>

COPYRIGHT AND LICENSE

       Copyright 2004, 2005 by Infinity Interactive, Inc.

       <http://www.iinteractive.com>

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

perl v5.10.1							    2005-07-14			 Tree::Simple::Visitor::BreadthFirstTraversal(3pm)

Shell Programming and Scripting