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PriorityQueue.js
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86 lines (65 loc) · 1.47 KB
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// User defined class
// to store element and its priority
class CellPQPair {
constructor(element) {
this.cell = element;
this.priority = element.priority;
}
}
// Cell PriorityQueue class
export class PriorityQueue {
constructor() {
this.cellContainer = [];
}
enqueue(pElement) {
let cellPair = new CellPQPair(pElement);
this.cellContainer.push(cellPair);
this.sort();
}
sort() {
this.cellContainer.sort((a, b) => {
return a.cell.priority - b.cell.priority;
});
}
dequeue() {
if (this.isEmpty()) {
console.log('Queue Underflow');
return null;
}
return this.cellContainer.shift().cell;
}
peek() {
if (this.isEmpty()) {
console.log('Queue Underflow');
return null;
}
return this.cellContainer[0].cell.id;
}
front() {
if (this.isEmpty()) {
console.log('Empty Queue');
return null;
}
return this.cellContainer[0].cell;
}
has(cell) {
return !!this.cellContainer.find(cell => cell.cell.id === cell.id);
}
equals(other) {
return this.cellContainer.every(cell => other.has(cell.cell));
}
isEmpty() {
return (this.cellContainer === undefined || this.cellContainer.length === 0);
}
printQue() {
this.cellContainer.forEach(function(element) {
console.log(element.cell + ' ' + element.priority);
}.bind(this));
}
length() {
return this.cellContainer.length;
}
clear() {
this.cellContainer = [];
}
}