karloscodes

sequenceDiagram
    participant John as John
    participant DB as Database
    participant Mary as Mary

    John->>DB: begin_transaction()
    Note over DB: Lock acquired on source & dest accounts

karloscodes

// -----------------------------------------------
// OOP dependency injection (the repository implementation can be switched in runtime)
// -----------------------------------------------
class UserService {
  constructor(userRepository) {
    this.userRepository = userRepository
  }

  create(params) {
    validate(params)

karloscodes

version: '3.3'

services:
 pg:
    image: postgres:10
    volumes:
      - pg_data:/var/lib/postgresql/data
    ports:
      - 5432:5432
      

karloscodes

# ruby --version
# ruby 2.6.3p62


require 'benchmark'

def without_splat(a, b, c); end

def with_splat(*a); end

karloscodes

const R = require('ramda');
const users = [
  { ses: { sesCreds: 1 }, senders: [{ sender: 11 }, { sender: 12 }, { sender: 13 }] },
  { ses: { sesCreds: 2 }, senders: [{ sender: 21 }, { sender: 22 }, { sender: 23 }] },
  { ses: { sesCreds: 3 }, senders: [{ sender: 31 }, { sender: 32 }, { sender: 33 }] }
];

const notificationTypes = ['Bounce', 'Complaint'];

karloscodes

Example to find an object inside an array given a name then, returns its value

const R = require('ramda');

const sesNotification = {
  "notificationType": "Delivery",
  "mail": {
    "headers": [
 {

karloscodes

const { forEach, fromIter, map, filter, pipe, interval, take, fromPromise, flatten } = require('callbag-basics');
const request = require('request-promise');
const Promise = require('bluebird');

const events = [
  { type: 'event', value: 1 },
  { type: 'event', value: 2 },
  { type: 'event', value: 3 },

karloscodes

// This is meant to be executed periodically, adapt it depending on you sell pace
// or create reports for previous weeks instead of using doing it in realtime.
var moment = Moment.load();
var ss = SpreadsheetApp.getActiveSpreadsheet();

var startOfLastWeek = moment.utc().startOf('week').add(1, 'd');
var endOfLastWeek = moment.utc().endOf('week').add(1, 'd');

Logger.log('Week starts: ' + startOfLastWeek.toString());
Logger.log('Week ends: ' + endOfLastWeek.toString());

karloscodes

class Email::Validate
  def self.call(email)
    new(email, RFC::CheckSyntaxt, SMTP::CheckUserExistance).call
  end

  attr_reader :email, :rfc_check_syntaxt, :smtp_check_user

  def initialize(email, rfc_check_syntaxt, smtp_check_user)
    @email = email
    @rfc_check_syntaxt = rfc_check_syntaxt

karloscodes

class Shape
  def initialize(color)
    @color = color
  end

  def repr
    raise 'Abstract method, to be implemented on subclasses'
  end

  def draw