I think the idea/idiom for your City1 -> City2 is a "Graph", where the cities are Nodes(or vertices's), and the distance between them is an "Edge".

In your case, it is a simple directed linear graph that can be implemented using Graph, or its derivative Graph::Simple.

                Memory fault   --   brain fried

In reply to Re: Fence vs. Posts by NetWallah
in thread Fence vs. Posts by rodinski

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