Priority Queue Javascript

Rajat Gupta
2 min readDec 11, 2021

In computer science, a priority queue is an abstract data type similar to a regular queue or stack data structure in which each element additionally has a “priority” associated with it. In a priority queue, an element with high priority is served before an element with low priority. In some implementations, if two elements have the same priority, they are served according to the order in which they were enqueued; in other implementations ordering of elements with the same priority remains undefined.

While coders often implement priority queues with heaps, they are conceptually distinct from heaps. A priority queue is a concept 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 with a variety of other methods such as an unordered array.

There is no in-built priority queue in Javascript but if you know the concept it's really easy to implement your own priority queue class. In this article, there will be a simple implementation of the priority queue.

Below is the implementation: Github link to copy the code

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Rajat Gupta
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Software Engineer at Volansi | San Jose State University Graduate