public QapResult <T> SearchBest <T>(Func <IEnumerable <T>, float> scoringStrategy, IEnumerable <T> startingPermutation, CancelationToken cancelationToken)
{
var score = scoringStrategy.Invoke(startingPermutation);
var steps = 0L;
var best = new QapResult <T>(startingPermutation, score, steps);
var seenSolutions = 0L;
var watch = new Stopwatch();
watch.Start();
while (!cancelationToken.IsCancelationPending())
{
bool hasNewBest = false;
foreach (var permutation in QapMath.Opt2(best.Solution))
{
steps++;
seenSolutions++;
score = scoringStrategy.Invoke(permutation);
if (score < best.Score)
{
best = new QapResult <T>(permutation, score, steps, seenSolutions);
best.FoundIn = watch.Elapsed;
hasNewBest = true;
}
}
if (!hasNewBest)
{
break;
}
}
watch.Stop();
best.TotalSolutionsSeen = seenSolutions;
return(best);
}
public QapResult <T> SearchBest <T>(Func <IEnumerable <T>, float> scoringStrategy, IEnumerable <T> startingPermutation, CancelationToken cancelationToken)
{
var steps = 0L;
var best = new QapResult <T>(startingPermutation, scoringStrategy.Invoke(startingPermutation), steps);
var last = startingPermutation;
var watch = new Stopwatch();
watch.Start();
while (!cancelationToken.IsCancelationPending())
{
steps++;
last = QapMath.Permutate(last);
var score = scoringStrategy.Invoke(last);
if (score < best.Score)
{
best = new QapResult <T>(last, score, steps, steps);
best.FoundIn = watch.Elapsed;
}
}
watch.Stop();
best.TotalSolutionsSeen = steps;
return(best);
}
