java - How do I use a PriorityQueue? - Stack Overflow
Mar 25, 2009 · When using a capacity-restricted queue, offer () is generally preferable to add (), which can fail to insert an element only by throwing an exception. And PriorityQueue is an unbounded …
How to use the priority queue STL for objects? - Stack Overflow
Oct 23, 2013 · A priority queue is an abstract data type that captures the idea of a container whose elements have "priorities" attached to them. An element of highest priority always appears at the …
Newest 'priority-queue' Questions - Stack Overflow
Aug 1, 2025 · I'm working on implementing a Double-Ended Priority Queue (DEAP) data structure in C++. I'm having trouble with establishing the correct implementation of node partnerships between …
c++ - Efficiency of the STL priority_queue - Stack Overflow
The documentation says: Priority_queue is a container adaptor, meaning that it is implemented on top of some underlying container type. By default that underlying type is vector, but a different type may be …
data structures - Priority Queues VS Queues - Stack Overflow
Nov 28, 2016 · How a Priority Queue a Queue Data Structure. Since it doesn't follow FIFO, shouldn't it be named Priority Array or Priority Linked LIst majorly because Priority Queues don't follow a fashion …
declaring a priority_queue in c++ with a custom comparator
Feb 2, 2015 · I'm trying to declare a priority_queue of nodes, using bool Compare(Node a, Node b) as the comparator function (which is outside the node class). What I currently have is: …
c++ - How to iterate over a priority_queue? - Stack Overflow
C++ priority_queue does not offer a .begin () pointer (like vector would do) that you can use to iterate over it. If you want to iterate over the priority queue to search for whether it contains a value then …
Order of elements with the same priority in std::priority_queue
Oct 2, 2019 · Nothing in the specification of priority_queue tells how elements with the same priority are sorted. You have to add information on your data and define a new ordering to take into account …
Are all queues, priority queues? If not, what is the difference?
Apr 24, 2023 · No, not all queues are priority queues. Regular queues are first-in-first-out structures: the order of insertion is the order of retrieval. Priority queues are based on priority: as items are inserted, …
c++ - initialization for STL priority queue - Stack Overflow
Mar 31, 2012 · 12 std::priority_queue cannot magically know how to sort the elements. You must tell it how to do so. The way to do that is to give priority_queue a functor type which, when called with two …