VP = fmt.Println.

VPf = fmt.Printf.

VPn (echo -n) = fmt.Print.

Iterator iterates through the length K combinations of an N sized set.

String iterates through all sub-string combinations of its source from shortest to longest.

StringN iterates through sub-string combinations of length K.

Types of the Callbacks implemented and provided to AStarFindPath A ConnectedFunc returns the neighbour nodes of node n in the graph.

A CostFunc returns a cost for the transition node a -> node b.

A EndFunc returns true if node is a/the destination.

A Path is a sequence of nodes in a graph.