/// <summary> /// Merges two priority queues and sets specified comparer for resultant priority queue /// </summary> /// <param name="pq1">first priority queue</param> /// <param name="pq2">second priority queue</param> /// <param name="comparer">comparer for resultant priority queue</param> /// <returns>resultant priority queue</returns> public static PriorityQueue <TPriority, TValue> MergeQueues(PriorityQueue <TPriority, TValue> pq1, PriorityQueue <TPriority, TValue> pq2, IComparer <TPriority> comparer) { if (pq1 == null || pq2 == null || comparer == null) { throw new ArgumentNullException(); } // merge data PriorityQueue <TPriority, TValue> result = new PriorityQueue <TPriority, TValue>(pq1.Count + pq2.Count, pq1._comparer); result._baseHeap.AddRange(pq1._baseHeap); result._baseHeap.AddRange(pq2._baseHeap); // heapify data for (int pos = result._baseHeap.Count / 2 - 1; pos >= 0; pos--) { result.HeapifyFromBeginningToEnd(pos); } return(result); }