如何在Ruby on Rails中实现无向图？

gem install ruby-graph

require 'graph'

graph = Graph.new

graph.add_vertex('A')
graph.add_vertex('B')
graph.add_vertex('C')

graph.add_edge('A', 'B')
graph.add_edge('B', 'C')
graph.add_edge('A', 'C')

puts "Vertices: #{graph.vertices.inspect}"
puts "Edges: #{graph.edges.inspect}"

ruby undirected_graph.rb

Vertices: ["A", "B", "C"]
Edges: [["A", "B"], ["B", "C"], ["A", "C"]]