Algorithm::Functional::BFS - A functional approach to the breadth-first search algorithm.
This implementation supports both cyclic and acyclic graphs but does not support edge or vertex weighting.
use Algorithm::Functional::BFS; # Create your object. my $bfs = Algorithm::Functional::BFS->new ( adjacent_nodes_func => $some_func, victory_func => $some_other_func, ); # Get a list (ref) of all the routes from your start node to the node(s) # that satisfy the victory condition. my $routes_ref = $bfs->search($start_node);
Create a new Algorithm::Functional::BFS object with the specified parameters.
adjacent_nodes_func: A function (reference to a sub) that, given a node, returns an array ref of adjacent nodes. If the node has no adjacent nodes, this function must return an empty array ref. victory_func: A function (referenec to a sub) that, given a node, returns a value that evaluates to true if and only if the node satisfies the victory condition of this search.
include_start_node: If this is a true value, then the start node is a candidate for the victory condition. That is, if the start node matches the victory condition, then a single route will be returned by the search algorithm, and that route will contain only the start node. one_result: If this is a true value, then the search stops after a single route is found, instead of searching for all the routes that satisfy the victory condition at the depth of the first route.
Perform a breadth-first-search from the specified node until the depth at which at least one node satisfies the victory condition. Returns an array ref of routes. Each route is an array ref of the nodes that are along the route from the start node to the node at which the victory condition was satisfied. Because this implementation works on cyclic graphs, multiple routes may be returned (and, indeed, multiple nodes at the same depth level may satisfy the victory condition). If the "one_result" option was passed to the constructor, then only one route will be returned, but it will still be encapsulated in another array ref.
<cww at cpan.org>
Please file issues at this project's GitHub repository site.
Copyright 2012 Colin Wetherbee.
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