Very simple directed acyclic graphs for Ruby.
Install the gem
gem install dag
Or add it to your Gemfile and run
dag = DAG.new v1 = dag.add_vertex v2 = dag.add_vertex v3 = dag.add_vertex dag.add_edge from: v1, to: v2 dag.add_edge from: v2, to: v3 v1.has_path_to?(v3) # => true v3.has_path_to?(v1) # => false dag.add_edge from: v3, to: v1 # => ArgumentError: A DAG must not have cycles dag.add_edge from: v1, to: v2 dag.add_edge from: v1, to: v3 v1.successors # => [v2, v3]
See the specs for more detailed usage scenarios.
Tested with Ruby 1.9.x, JRuby, Rubinius. See the build status for details.
(The MIT License)
Copyright (c) 2013 Kevin Rutherford
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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