PriorityQueue

Installation

npm install priorityqueue

Example

import PriorityQueue from "priorityqueue";
class Point {
 constructor(x, y) {
 this.x = x;
 this.y = y;
 }
}
const numericCompare = (a, b) => (a > b ? 1 : a < b ? -1 : 0);
const comparator = (a, b) => {
 const x = numericCompare(a.x, b.x);
 const y = numericCompare(a.y, b.y);
 return x ? x : y;
};
const pq = new PriorityQueue({ comparator });
pq.push(new Point(4, 6));
pq.push(new Point(2, 3));
pq.push(new Point(5, 1));
pq.push(new Point(1, 2));
console.log(pq.pop()); // => {x: 5, y: 1}
console.log(pq.top()); // => {x: 4, y: 6}
pq.push(new Point(3, 4));
pq.push(new Point(6, 5));
console.log(pq.length); // => 5
console.log(pq.top()); // => {x: 6, y: 5}

References

Variation

BinaryHeap(default)

PairingHeap

SkewHeap

Import specific implementation

import PriorityQueue from "priorityqueue";
import BinaryHeap from "priorityqueue/BinaryHeap";
import PairingHeap from "priorityqueue/PairingHeap";
import SkewHeap from "priorityqueue/SkewHeap";
console.log(PriorityQueue === BinaryHeap); // => true

TypeScript users