graph :: Digraph :: arcs
var g = new HashDigraph[Int] g.add_arc(1, 3) g.add_arc(2, 3) assert g.arcs.length == 2
# Returns the arcs of this graph. # # ~~~ # var g = new HashDigraph[Int] # g.add_arc(1, 3) # g.add_arc(2, 3) # assert g.arcs.length == 2 # ~~~ fun arcs: Array[Array[V]] do return [for arc in arcs_iterator do arc]