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class QElement {
element: unknown;
priority: number;
constructor(element: unknown, priority: number) {
this.element = element;
this.priority = priority;
}
}
export class PriorityQueue {
items: Array<QElement>;
constructor(elt?: unknown) {
this.items = [];
if (elt !== undefined) this.enqueue(elt, 0);
}
enqueue(element: unknown, priority: number): void {
let qElement = new QElement(element, priority);
for (let i = 0; i < this.items.length; ++i) {
if (this.items[i].priority > qElement.priority) {
this.items.splice(i, 0, qElement);
return;
}
}
this.items.push(qElement);
}
dequeue(): unknown {
// we would use pop to get the highest priority, shift() gives us the lowest priority
return this.items.shift()?.element;
}
isEmpty(): boolean {
return this.items.length === 0;
}
}
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