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Travelling Salesman Problems

by tedv (Pilgrim)
on Nov 08, 2000 at 23:40 UTC ( #40611=note: print w/replies, xml ) Need Help??


in reply to Graph Traversal

If you want some good insight into travelling salesman problems, try playing the board game Elflands by Alan Moon. I've only played it a few times, but I'm sure that after 10 games, I'd have a much better feel for coming up with an adequate TSP solution. Note that the perfect TSP solution is an NP complete problem, so don't aim for the optimal solution. Aim for "good enough".

-Ted

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[Eily]: you could tie a variable into not having the same value each time, if you like to make people who try to debug your code facepalm
[Corion]: perl -wle 'package o; use overload q("") => sub {warn "str"; ""}, bool => sub{warn "bool"; 1}; package main; my $o={}; bless $o => o; print "Yay" if ($o && !length($o))'
[Corion]: But people writing such code should document the objects they construct and why it makes sense for an object to be invisible as string while being true in a boolean context
[hippo]: That's equal parts clever and horrendous.
[Eily]: the overload version wouldn't return true with "$x" && !length $x though, I guess
[hippo]: The more I look at this code, the more $x is a plain old scalar and the more this condition will never be true. I'm calling it a bug at this point.
[hippo]: Thanks for your input which has soothed my sanity (a little)
[Corion]: Eily: Sure - if you force both things into stringy things, then you break that magic. But that would also mean that you changed the expression, as now $x = 0.00 will be true instead of false as it were before
[Corion]: Ah no, at least in my feeble experiments that doesn't change the meaning
[Corion]: We sell sanity in small packages ;)

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