jooeycheng

# [A] OpenSSL::PKey::RSA has undocumented `e=' and `n=' methods
exponent = "10001"
modulus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

rsa   = OpenSSL::PKey::RSA.new
e     = exponent.to_i(16)
n     = modulus.to_i(16)
rsa.e = OpenSSL::BN.new(e)
rsa.n = OpenSSL::BN.new(n)

jooeycheng

$: (Dollar Colon)          is basically a shorthand version of $LOAD_PATH. 
                           contains an array of paths that your script will search through when using require.
$0 (Dollar Zero)           contains the name of the ruby program being run. This is typically the script name.
$* (Dollar Splat)          is basically shorthand for ARGV. $* contains the command line arguments that were passed to the script.
$? (Dollar Question Mark)  returns the exit status of the last child process to finish.
$$ (Dollar Dollar)         returns the process number of the program currently being ran.
$~ (Dollar Tilde)          contains the MatchData from the previous successful pattern match.
$1, $2, $3, $4 etc         represent the content of the previous successful pattern match.
$& (Dollar Ampersand)      contains the matched string from the previous successful pattern match.
$+ (Dollar Plus)           contains the last match from the previous successful pattern match.

jooeycheng

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

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

jooeycheng

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)

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

https://searchlight.rocks/

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

# 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',