02 Feb 2021 02:04:51 UTC
- Distribution: Tree-Simple-VisitorFactory
- Module version: 0.16
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- License: perl_5
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Tree::Simple::Visitor::BreadthFirstTraversal - A Visitor for breadth-first traversal a Tree::Simple hierarchy
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 ", " => $visitor->getResults(); # this will print this: # 1, 2, 3, 1.1, 1.2, 2.1, 3.1, 1.1.1 # assuming your tree is like this: # 1 # 1.1 # 1.1.1 # 1.2 # 2 # 2.1 # 3 # 3.1
This implements a breadth-first traversal of a Tree::Simple hierarchy. This can be an alternative to the built in depth-first traversal of the Tree::Simple
There are no arguments to the constructor the object will be in its default state. You can use the
setNodeFiltermethod to customize its behavior.
- includeTrunk ($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
$filter_functionargument and throws an exception if it is not a code reference. This code reference is used to filter the tree nodes as they are collected. This can be used to customize output, or to gather specific information from a more complex tree node. The filter function should accept a single argument, which is the current Tree::Simple object.
- visit ($tree)
This is the method that is used by the Tree::Simple
acceptmethod. It can also be used on its own, it requires the
$treeargument to be a Tree::Simple object (or derived from a Tree::Simple object), and will throw and exception otherwise.
This method returns the accumulated results of the application of the node filter to the tree.
Bugs should be reported via the CPAN bug tracker at
See the CODE COVERAGE section in Tree::Simple::VisitorFactory for more information.
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.
stevan little, <firstname.lastname@example.org>
Copyright 2004, 2005 by Infinity Interactive, Inc.
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
Module Install Instructions
To install Tree::Simple::VisitorFactory, copy and paste the appropriate command in to your terminal.
perl -MCPAN -e shell install Tree::Simple::VisitorFactory
For more information on module installation, please visit the detailed CPAN module installation guide.