public double Cost()
{
return(Cycle().Aggregate(
0.0,
(sum, stop) =>
sum + Stop.Distance(stop, stop.Next)));
}
//return an ordered nearest neighbor set
private static IEnumerable <Stop> NearestNeighbors(this IEnumerable <Stop> stops)
{
var stopsLeft = stops.ToList();
for (var stop = stopsLeft.First();
stop != null;
stop = stopsLeft.MinBy(s => Stop.Distance(stop, s)))
{
stopsLeft.Remove(stop);
yield return(stop);
}
}
