public HashTree Build()
{
var reader = new FileReader();
int[][] dataSet = reader.Read("retail.dat.txt");
//int[][] dataSet = { new[] {1, 2, 3, 4, 5, 6}, new[] {4 ,5}, new[] {5, 6}, new[] {1}, new[] {1, 5}};
var jobs = new Task[K];
_forest = new HashTree[K];
for (int i = 0; i < K; i++)
{
int j = i;
var job = new Task(() => Job(dataSet, j));
jobs[i] = job;
job.Start();
}
Task.WaitAll(jobs);
HashTree hashTree = _forest[0];
foreach (var tree in _forest.Skip(1))
{
hashTree.Merge(tree);
}
WriteLine("Tree properly saved.");
return(hashTree);
}
