The A* algorithm

The OCaml Journal just published an article about path finding:

"The A* algorithm is often used for route finding in game AI and is a generalization of Dijkstra's shortest-path algorithm from graph theory. This article describes a simple implementation of the A* algorithm written in OCaml that makes extensive use of the module system including higher-order modules (functors) in order to provide a reusable implementation of this algorithm that is generic over the kinds of graphs that it can handle. Finally, an example application is provided that finds a route around a hill...."

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