ChristianOellers

// Get random of 3 elements
this.spriteVariant = parseInt((Math.random() * 100) % 3);

// On every reached interval (ms), do sth.
// - e.g. increase difficulty in a game
this.time++;
this.interval = 1000;
const difference = (this.time % this.interval) ? 0 : 1;

// Fade away effect over total time (max. to zero).

ChristianOellers

import useFetch from 'useFetch'

const url = 'https://pokeapi.co/api/v2/pokemon/pikachu'

function ExampleComponent () {
  const {isLoading, data} = useFetch(url)

  return (
    <>
      {isLoading && <p>Loading ...</p>}

ChristianOellers

/**
 * WOYTON Salad bar - Food scraper.
 *
 * About
 * - Tech demo of a functioning real world scraper, that actually worked and resulted in random salad orders.
 *   Not judging if these actually tasted good or not ;) ... As of 2023, the technology is outdated
 *   and you might find tools like Puppeteer easier to use, than the messy Selenium + browser stack.
 *
 * Note
 * - Any URLs and personal data have been censored to avoid messing around with their website ;)

ChristianOellers

Unit Testing - Intro

TDD-focused mini tutorial for an imaginary, minimal feature described below.

Goals: Deeply think about features, expectations and limitations. Write code last.

Based on the '5 Step Method' described on CodeUtopia.

Example feature

ChristianOellers

/**
 * Generate random hex color of defined length.
 *
 * Color function returns 1-2 values on each call.
 * The result is filled up from a potentially missing value.
 *
 * @example
 *   getRandomHexColor(6);     // #ffffff
 *   getRandomHexColor(8, ''); // ffffffff
 * @param {Number} hexLength 6|8 for full RGB|ARGB range.

ChristianOellers

<?php

declare(strict_types=1);

namespace App;

use PDO;

use function is_array;

ChristianOellers

-- CONFIG

SET @prefix = 'wp_XXXX';

-- DEV -> LIVE
SET @url_from = 'http://127.0.0.1';
SET @url_to   = 'https://www.example.com';

-- LIVE -> DEV
/* * /

ChristianOellers

-- Change user IDs for security.
--
-- Also change manually:
-- * AUTO_INCREMENT value of 'users' table, e.g. > 10000
-- * Fields in 'users' and 'usermeta' that disclose the login name

-- example.com
UPDATE wp_1234_users SET ID = 12345 WHERE ID = 1;
UPDATE wp_1234_usermeta SET user_id = 12345 WHERE user_id = 1;
UPDATE wp_1234_posts SET post_author = 12345 WHERE post_author = 1;

ChristianOellers

/**
 * Extended math functionality.
 *
 * Features
 * - Distance calculation
 * - Angle calculation and conversion
 */
class MathHelper {
  /**
   * Constructor

ChristianOellers

/**
 * Canvas 2D API helper functions.
 *
 * Features
 * - Clear/Reset canvas data.
 * - Simplify translation + rotation.
 * - Draw points, boxes, lines as visual helpers.
 */
class CanvasHelper {
  #optionsDefault = {