CezaryDanielNowak

/**
 * How to use:
 * In the render function, include
 * 
 *     window.whyRerender && window.whyRerender(this.props, this.state);
 */

window.whyRerender = (props, state) => {
	if (window.whyRerender.prevProps) {
		const propsDiff = Object.keys(props).map((propName) => {

CezaryDanielNowak

// gets device orientation.
// possible values: "landscape" | "portrait" | "" (can't detect)
const getCSSDeviceOrientation = () => {
  function mediaQuery(orientation) {
    return `(orientation: ${orientation})`;
  }

  const orientations = ['landscape', 'portrait'];
  for (let orientation of orientations) {

CezaryDanielNowak

class _FaceDetector {
  initPerformed = false;
  loadPerformed = false;

  constructor() {
    const canvas = document.createElement('canvas');
    this.canvas = canvas;
    this.ctx = canvas.getContext('2d');
    canvas.style.visibility = 'hidden';

CezaryDanielNowak

/**
 * BarcodeDetector has an "Experimental" status. It sometimes doesn't work for no reason.
 *
 * @param  {string} barcodeType  only qr_code and pdf417 are supported
 * @return {boolean}             (async) If BarcodeDetector works or not
 */
const isBarcodeDetectorWorking = (barcodeType) => {
  return new Promise((resolve, reject) => {
    if (typeof BarcodeDetector === 'undefined') return reject('UNSUPPORTED');

CezaryDanielNowak

<?php
/*
  Place this file in writable directory. Each incoming request will be saved as a file.
  Sample file name:
    callback_POST_08-17-2022 13.42.05.780400.txt
*/

$now = DateTime::createFromFormat('U.u', microtime(true));

$file_name = 'callback_' . $_SERVER['REQUEST_METHOD'] . '_' . $now->format("m-d-Y H.i.s.u").'.txt';

CezaryDanielNowak

- Why subscriptions of apps purchased in App Store can be cancelled only in "Music"?
- Why navigating between maximized window and non-maximized windows is so hard?
- Why Finder can't be maximized?
- Why file paths are hidden?
- Why "open file"/"save file" dialog suck so much? 
- Why transfer speed is hidden when moving file between location A and B ?

CezaryDanielNowak

/*
 * I had to print a lot of json data on a printer so I wanted to make it
 * as compact as possible.
 *
 * This snippet changes text JSON into compact form.
 * 
 * input:
 *  `{
 *    "width": 1080,
 *    "height": 1920,

CezaryDanielNowak

/*
 * Some JS objects like InputDeviceInfo or GeolocationCoordinates are impossible to clone easly.
 * `Object.keys(obj)` returns `{}`
 * `JSON.stringify(obj)` returns `{}`
 * 
 * with following functions you're able to clone object properties to the simple object.
 */

function cloneGeolocationCoordinates(instance) {
  return Object.keys(instance.constructor.prototype).reduce((acc, key) => {

CezaryDanielNowak

// Extra filters for https://github.com/kig/canvasfilters.git


Filters.scaleUp = function (imageData, scale = 2) {
  const sourceWidth = imageData.width;
  const sourceHeight = imageData.height;

  const targetWidth = parseInt(sourceWidth * scale, 10);
  const targetHeight = parseInt(sourceHeight * scale, 10);

CezaryDanielNowak

/*
 * This code helps with logging image processed in the worker.
 * 
 * Simple visual explanation for image transformation.
 */

// WORKER:
postMessage({
  imageData,
});