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@zazaulola
zazaulola / sha256.js
Created September 21, 2025 10:51
Accurate implementation of SHA-256. Produces the correct result, unlike ```crypto.subtle.digest()```.
function sha256(str) {
// Примечание: 'n >>> 0' используется для преобразования числа в 32-битное беззнаковое целое
const K = [
0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
@zazaulola
zazaulola / split-string.js
Created September 21, 2025 10:46
Split a large string into strings of a specified length
const splitString = (str, num = 72) => str.split(new RegExp(`(?<=^(?:.{${num}})*)`,'g'));
@zazaulola
zazaulola / demo.ts
Created December 23, 2024 04:35 — forked from vedantroy/demo.ts
SQLite-backed key-value store with JS-like object manipulation and automatic JSON serialization.
import Database from 'better-sqlite3';
import { createDatabaseClient } from './proxy.ts';
// 1) Create an in-memory DB and your table(s).
const db = new Database(':memory:');
db.exec(`
CREATE TABLE users (
id TEXT PRIMARY KEY,
data JSON
);
function debounce(fn, ms, obj){
return Object.assign( function fx(...args){
const now = Date.now();
if(now - fx.lastCall > ms){
fx.lastCall = now;
return fx.fn.call(fx.obj,...args);
}
if(fx.timeout) clearTimeout(fx.timeout);
fx.timeout = setTimeout(()=>fx(...args), fx.lastCall + ms - now);
}, { fn, obj, lastCall: 0, timeout: null });
/** @format */
const path = require('path');
const fs = require('fs');
const https = require('https');
const http = require('http');
const cheerio = require('cheerio');
const os = require('os');
// Configuration
@zazaulola
zazaulola / svg-to-data-url.js
Created November 5, 2024 04:40
Convert string with SVG code to DataURL
// for modern browsers
const svgToDataUrl = svg => `data:image/svg+xml;utf8,${svg.replace(/[#%]/g,s=>'%'+s.charCodeAt(0))}`;
// for old browsers
const svgToDataUrl = svg => `data:image/svg+xml;utf8,${svg.replace(/[<>#%{}"\s]/g,s=>'%'+s.charCodeAt(0))}`;
@zazaulola
zazaulola / README.md
Created November 5, 2024 04:17 — forked from storm1er/README.md
Script for OBS Studio to publish session stats to MQTT broker with autodiscovery set up for Home Assistant

OBS MQTT Status to Home Assistant

Setup:

  1. Download script
  2. Install mqtt-wrapper pip install mqtt-wrapper
  3. Open OBS Studio
  4. In OBS Studio add a script (Tools -> Scripts)
  5. Configure script parameters (my base channel is homeassistant and my sensor name is obs, creating the path homeassistant/sensor/obs)

script_parameters

// Debug mode
const DEBUG = true;
const log = (...args) => {
if (DEBUG) console.log(...args);
}
// regular expression to parse numbers
const rxNumberStr = '[+-]?(?:(?:[0-9]+\\.[0-9]+)|(?:\\.[0-9]+)|(?:[0-9]+))(?:[eE][+-]?[0-9]+)?';
// regular expression to parse next lemma from d attribute of <path>
const rxDLemmaStr = `[MmLlHhVvCcSsQqTtAaZz]|${rxNumberStr}`;
@zazaulola
zazaulola / calendar-util.js
Created October 7, 2024 11:25
Some calendar functions
// calculate week number for date
function calcWN(y, m, d) {
let J = gc2jd(y, m, d);
let d4 = (J + 31741 - J % 7) % 146097 % 36524 % 1461;
let L = 0 | d4 / 1460;
let d1 = (d4 - L) % 365 + L;
return (0 | d1 / 7) + 1;
}
@zazaulola
zazaulola / SearchInTheShadows.js
Last active August 14, 2024 01:12 — forked from Spencer-Doak/SearchInTheShadows.js
Recursively find all shadow roots in a page.
/**
* Find all elements with openned ShadowRoots
*
* @param {Node} e - An element that we should search for ShadowRoots within.
* @returns {Array<Element>} Array of Elements that holds ShadowRoot
*/
const findRoots = (e = document.documentElement) =>
[e,...e.querySelectorAll('*')]
.filter(e => e.shadowRoot)
.flatMap(e => [e, ...findRoots(e.shadowRoot)]);