From 3430a7074b85b12bb16d9906c04e857448e85f44 Mon Sep 17 00:00:00 2001
From: Julien Dessaux
Date: Wed, 28 Dec 2022 20:03:29 +0100
Subject: 2022-19 in js

---
 2022/19-Not-Enough-Minerals/priority_queue.js | 39 +++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 2022/19-Not-Enough-Minerals/priority_queue.js

(limited to '2022/19-Not-Enough-Minerals/priority_queue.js')

diff --git a/2022/19-Not-Enough-Minerals/priority_queue.js b/2022/19-Not-Enough-Minerals/priority_queue.js
new file mode 100644
index 0000000..76e513c
--- /dev/null
+++ b/2022/19-Not-Enough-Minerals/priority_queue.js
@@ -0,0 +1,39 @@
+export class QElement {
+	constructor(element, priority) {
+		this.element = element;
+		this.priority = priority;
+	}
+}
+
+export class PriorityQueue {
+	constructor(elt) {
+		this.items = [];
+		if (elt !== undefined) {
+			this.enqueue(elt, 0);
+		}
+	}
+
+	enqueue(element, priority) {
+		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() {
+		return this.items.pop(); // pop highest priority, use shift() for lower priority
+	}
+	front() {
+		return this.items[0];
+	}
+	rear() {
+		return this.items[this.items.length - 1];
+	}
+	isEmpty() {
+		return this.items.length === 0;
+	}
+}
-- 
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