Hi,
I am trying to write a routine that would generate a graph - where each vertex would be a string.

type Graph v = [(v,[v])]  -- list of tuples of vertices and adjacent vertices list

addEdgeToGraph :: Graph -> String -> String -> Graph

I am having trouble coming up with the body of this function - that takes the original graph, and an edge (string -> string) and the produces the new graph.

--
Regards,
Kashyap