Return hash map/set for vertices #56
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mtfishman
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mtfishman
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A downside of this is that the output of
vertices(g::NamedGraph)no longer has a well-defined ordering corresponding to the memory ordering of the vertices of the parent graph, and instead should be treated as, and now outputs, a set. However, an upshot is that vertex lookup is faster (O(1)instead ofO(nv(g))), and user code shouldn't rely on vertex ordering anyway so I think it forces better code style.