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Linux gallant-poincare.82-165-91-112.plesk.page 6.1.0-37-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.140-1 (2025-05-22) x86_64
Priv8 Uploader By InMyMine7
Linux gallant-poincare.82-165-91-112.plesk.page 6.1.0-37-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.140-1 (2025-05-22) x86_64
| Server IP : 82.165.91.112 / Your IP : 216.73.216.147 Web Server : Apache System : Linux gallant-poincare.82-165-91-112.plesk.page 6.1.0-37-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.140-1 (2025-05-22) x86_64 User : nr7.net_tfpqq467gv ( 10001) PHP Version : 8.4.25 Disable Function : opcache_get_status MySQL : OFF | cURL : ON | WGET : OFF | Perl : OFF | Python : OFF | Sudo : OFF | Pkexec : OFF Directory : /var/www/vhosts/nr7.net/emdash.nr7.net/node_modules/yocto-queue/ |
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/*
How it works:
`this.#head` is an instance of `Node` which keeps track of its current value and nests another instance of `Node` that keeps the value that comes after it. When a value is provided to `.enqueue()`, the code needs to iterate through `this.#head`, going deeper and deeper to find the last value. However, iterating through every single item is slow. This problem is solved by saving a reference to the last value as `this.#tail` so that it can reference it to add a new value.
*/
class Node {
value;
next;
constructor(value) {
this.value = value;
}
}
export default class Queue {
#head;
#tail;
#size;
constructor() {
this.clear();
}
enqueue(value) {
const node = new Node(value);
if (this.#head) {
this.#tail.next = node;
this.#tail = node;
} else {
this.#head = node;
this.#tail = node;
}
this.#size++;
}
dequeue() {
const current = this.#head;
if (!current) {
return;
}
this.#head = this.#head.next;
this.#size--;
// Clean up tail reference when queue becomes empty
if (!this.#head) {
this.#tail = undefined;
}
return current.value;
}
peek() {
if (!this.#head) {
return;
}
return this.#head.value;
// TODO: Node.js 18.
// return this.#head?.value;
}
clear() {
this.#head = undefined;
this.#tail = undefined;
this.#size = 0;
}
get size() {
return this.#size;
}
* [Symbol.iterator]() {
let current = this.#head;
while (current) {
yield current.value;
current = current.next;
}
}
* drain() {
while (this.#head) {
yield this.dequeue();
}
}
}