I have a directed graph given as list of pairs ((from-node . to-node) ...) and need to detect whether adding a pair would create a cycle.
Is there an easy way to do this already, e.g. some Planet package or snippet someone would like to share? I don't want to reinvent the wheel and this is not a homework question. Best, Erich ____________________ Racket Users list: http://lists.racket-lang.org/users
