This may instead be specified as separate " peek_at_highest_priority_element" and " delete_element" functions, which can be combined to produce " pull_highest_priority_element". Some conventions reverse the order of priorities, considering lower values to be higher priority, so this may also be known as " get_minimum_element", and is often referred to as " get-min" in the literature. This is also known as " pop_element(Off)", " get_maximum_element" or " get_front(most)_element". pull_highest_priority_element: remove the element from the queue that has the highest priority, and return it.insert_with_priority: add an element to the queue with an associated priority.is_empty: check whether the queue has no elements.A priority queue is an abstract data structure like a list or a map just as a list can be implemented with a linked list or with an array, a priority queue can be implemented with a heap or another method such as an unordered array.Ī priority queue must at least support the following operations: While priority queues are often implemented using heaps, they are conceptually distinct from heaps. In other implementations, the order of elements with the same priority is undefined. In some implementations, if two elements have the same priority, they are served in the same order in which they were enqueued. In a priority queue, elements with high priority are served before elements with low priority. Each element in a priority queue has an associated priority. In computer science, a priority queue is an abstract data-type similar to a regular queue or stack data structure.
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