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TSort implements topological sorting using Tarjan's algorithm for strongly
connected components.
TSort is designed to be able to be used with any object which can be interpreted
as a directed graph.
TSort requires two methods to interpret an object as a graph, tsort_each_node
and tsort_each_child:
- tsort_each_node is used to iterate for all nodes over a graph.
- tsort_each_child is used to iterate for child nodes of a given node.
The equality of nodes are defined by eql? and hash since TSort uses Hash
internally.
WWW: https://github.com/ruby/tsort
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