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oWeRQ

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oWeRQ / idle-localstorage.html
Created June 29, 2023 15:05
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Idle LocalStorage</title>
<script defer>
function uniqId() {
return Math.random().toString(36).slice(2);
}
@oWeRQ
oWeRQ / idle-broadcast.html
Last active June 29, 2023 14:43
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Idle Broadcast</title>
<script defer>
function uniqId() {
return Math.random().toString(36).slice(2);
}
@oWeRQ
oWeRQ / waitValue.js
Created June 29, 2023 10:22
function waitValue(cb, delay = 1000) {
return new Promise((resolve) => {
queueMicrotask(() => {
const value = cb();
if (value != null) {
resolve(value);
} else {
const interval = setInterval(() => {
const value = cb();
if (value != null) {
@oWeRQ
oWeRQ / mutex.ts
Created June 26, 2023 11:05
const mutex = (key: string, timeout: number) => {
return new Promise<() => void>((resolve) => {
const expires = window.localStorage.getItem(key);
const lock = () => {
const expiresDate = new Date();
expiresDate.setTime(expiresDate.getTime() + timeout);
window.localStorage.setItem(key, expiresDate.toString());
resolve(() => {
@oWeRQ
oWeRQ / MapSet.ts
Created June 23, 2023 15:04
class MapSet<K, V> extends Map<K, Set<V>> {
add(key: K, value: V) {
let set = this.get(key);
if (!set) {
set = new Set();
this.set(key, set);
}
set.add(value);
return this;
}
@oWeRQ
oWeRQ / MapSet.js
Created June 23, 2023 14:57
class MapSet extends Map {
add(key, value) {
let set = this.get(key);
if (!set) {
set = new Set();
this.set(key, set);
}
set.add(value);
return this;
}
@oWeRQ
oWeRQ / singlePromise.js
Created June 23, 2023 14:24
function singlePromise(cb) {
let promise = null;
return function(...args) {
if (!promise) {
promise = new Promise(async (resolve) => {
resolve(await cb(...args));
promise = null;
});
}
@oWeRQ
oWeRQ / useObservableRef.ts
Last active June 14, 2023 10:19
import { useEffect, useMemo, useRef } from 'react';
export interface Listener<T> {
(value: T): void;
}
export interface ObservableRef<T> {
(value: T): void;
current: T;
subscribe(listener: Listener<T>): () => void;
@oWeRQ
oWeRQ / signal.ts
Last active June 1, 2023 12:18
interface Observer<T> {
subscribe(listener: (value: T) => void): () => void;
emit(value: T): void;
}
function createObserver<T>(): Observer<T> {
const listeners = new Set<(value: T) => void>();
return {
subscribe(listener: (value: T) => void) {
@oWeRQ
oWeRQ / elfhash.c
Created May 11, 2023 11:21
#include <stdio.h>
unsigned int ElfHash(const unsigned char *s)
{
unsigned int h = 0, high;
while (*s)
{
h = (h << 4) + *s++;
if (high = h & 0xF0000000)
h ^= high >> 24;