joanna-liana

interface Client {
  pay(): void;
}

interface VIP extends Client {
  fastPay(): void;
}

interface Cashier {
  handleAnyClient(client: Client): void; // wider and narrower Clients allowed

joanna-liana

// to be run in the browser
// at https://www.youtube.com/playlist?list=WL
// might need a few reruns based on the number of items
function removeWatchLaterItems() {
  const items = Array.from(document.querySelector("div.ytd-playlist-video-list-renderer:nth-child(3)").children);

  for (let i = 0; i < items.length; i++) {
    const item = items[i];

    setTimeout(() => {

joanna-liana

module.exports = function (_wallaby) {
  return {
    files: ['src/**/*.ts', '!src/**/*spec.ts'],

    tests: ['src/**/*spec.ts'],

    testFramework: 'jest',

    env: {
      type: 'node',

joanna-liana

const withDefaults = (
  {
    a = 'a default',
    b
  }: {
    a?: string;
    b?: number;
  }
) => console.log(a, b);

joanna-liana

dpkg --print-architecture
# amd64

uname -m
# x86_64

joanna-liana

const nested = { a: { b: { c: { d: 1 } } } };

// { a: { b: { c: [Object] } } }
console.log(nested);

// {
//   a: { b: { c: { d: 1 } } }
// }
console.log(
  util.inspect(nested, { depth: null, colors: true })

joanna-liana

type ReadonlyRecord<Record> = {
  readonly [Key in keyof Record]: ReadonlyRecord<Record[Key]>
}

joanna-liana

#!/usr/bin/env bash

# Script adapted from https://golangcode.com/updating-go-on-ubuntu/

set -o errexit

main () {
  if ! [[ -z "$1" ]]
  then
    printf "❕ To update Go to the latest version, you do not need to provide any arguments.\nAlternatively, provide just the name of the specific Linux archive, e.g. go1.19.linux-amd64.tar.gz\n\n"

joanna-liana

describe('Assertions with expected value alias', () => {
  it('reports the failure with a meaningul message', async () => {
    expect(7).toBe(42, 'The Answer to the Ultimate Question of Life, the Universe, and Everything');
  });

  it('given no custom value alias, it reports the failure with the standard message', async () => {
    expect(7).toBe(42);
  });
});

joanna-liana

version: '2.4'
services:
  postgres:
    image: postgres:12.4
    restart: always
    command: [
      "postgres",
      "-c",
      "log_statement=all",
      "-c",