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AI solution for JavaScript Coding Question on BFE.dev
24. create a Priority Queue in JavaScript

Here is a possible solution for the Priority Queue in JavaScript:

class PriorityQueue {
  constructor(compare) {
    this.queue = [];
    this.compare = compare;
  }

  add(element) {
    this.queue.push(element);
    this.queue.sort(this.compare);
  }

  poll() {
    return this.queue.shift();
  }

  peek() {
    return this.queue[0];
  }

  size() {
    return this.queue.length;
  }
}

Explanation:

  • The Priority Queue constructor takes a compare function that defines the order in which the elements should be sorted.
  • The add method adds a new element to the queue and sorts it based on the compare function.
  • The poll method removes and returns the head element of the queue.
  • The peek method returns the head element without removing it.
  • The size method returns the amount of items in the queue.

Note that, depending on the use case, there might be more efficient ways to implement a Priority Queue in JavaScript, such as using a heap instead of sorting the whole array every time a new element is added.