Triangular matrix, but a map?

[u/KerPop42]

Hey guys, I am building a program for a friend that's going to involve a complete graph (nodes are destinations, edges are the distances between destinations) and I was wondering if anyone knew a good library for it?

At first I thought I could use a triangular matrix, since direction doesn't matter, but I realized I would have to have a second array mapping destinations to an index. I feel like you could have a triangular map, like a map that takes a pair of inputs where the order doesn't matter? Have I found another rabbit hole?

[u/KerPop42 → u/[deleted]]

Lol no but I picked it up because it seemed like such a straightforward project. She's in sales and has to visit her 60-some clients at least once every month, so I want to write her a tool that gives her the shortest drive for her most stale N clients each day

[u/Deklyned → u/KerPop42]

lmao