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class Material {
  public static readonly ACRYLIC = new Material(`ACRYLIC`, `AC`, `Acrylic`);
  public static readonly ALUM = new Material(`ALUM`, `AL`, `Aluminum`);
  public static readonly CORK = new Material(`CORK`, `CO`, `Cork`);
  public static readonly FOAM = new Material(`FOAM`, `FO`, `Foam`);

  // private to diallow creating other instances of this type.
  private constructor(public readonly key: string, public readonly id: string, public readonly name: string) {}

  public toString(): string {

jooeycheng

https://searchlight.rocks/

jooeycheng

• File sharing - https://send.firefox.com/
• Video conferencing - https://meet.jitsi.net/

jooeycheng

Class

export class OrderCreationValidator {
  validateParams (params: OrderCreationParams) {
    this.validateAccountId(params)
    this.validateSku(params)
  }

  private validateAccountId(params: OrderCreationParams) {

jooeycheng

// Simplified from https://github.com/dabit3/dynamodb-documentclient-cheat-sheet

/**
 * DynamoDB.DocumentClient
 */
const dynamoDbClient = new AWS.DynamoDB.DocumentClient({
  region: 'ap-southeast-1',
  convertEmptyValues: true,
  httpOptions: {
    connectTimeout: 1000, // 1s

jooeycheng

Import/Export

• https://javascript.info/import-export
• https://stackoverflow.com/questions/37200080/how-to-export-imported-object-in-es6

export let months = ['Jan', 'Feb', 'Mar','Apr', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];

export const MODULES_BECAME_STANDARD_YEAR = 2015;

export function sayHi() { ... }

jooeycheng

/**
 * Sample Component file for reference, because Joey forgets simple stuff.
 */
import React from 'react';

import './Sample.scss';

class Sample extends React.Component {
  constructor(props) {
    super(props);

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# Setup
# ./spec/spec_helper.rb

Capybara.register_driver :poltergeist do |app|
  options = {
    debug: true, # debug mode, verbose logs
    timeout: 30,
    window_size: [360, 640],
    phantomjs_options: [
      '--proxy-type=none',

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The RSpec

# spec/models/country_spec.rb

describe Country, type: :model do
  describe 'FactoryBot' do
    describe '.build' do
      it 'should .save! succesfully' do
        expect { build(:country).save! }.to change { Country.count }.by(1)

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Add ruby-version

# .ruby-version

2.5.1

Set up Capistrano

https://www.digitalocean.com/community/tutorials/deploying-a-rails-app-on-ubuntu-14-04-with-capistrano-nginx-and-puma