OlivierJM

# nil? can be used on any Ruby object. It returns true only if the object is nil.
nil.nil?   # => true 
[].nil?    # => false 
{}.nil?    # => false
"".nil?    # => false
" ".nil?   # => false
true.nil?  # => false

# empty? can be used on some Ruby objects including Arrays, Hashes and Strings. It returns true only if the object's length is zero.
nil.empty?   # NoMethodError: undefined method `empty?' for nil:NilClass

OlivierJM

//...
// some interfaces imports skipped
//...

const createDirectUploadMutation = `
  mutation createDirectUploadMutation(
    $filename: String!
    $byteSize: Int!
    $contentType: String!
  ) {

OlivierJM

  function generateColor() {
    return (
      "#" +
      Math.random()
        .toString(16)
        .substr(-6)
    )
  }

OlivierJM

CraigMaslowski.erb
dbaeumer.vscode-eslint
esbenp.prettier-vscode
ms-vscode-remote.remote-ssh
ms-vscode-remote.remote-ssh-edit
ms-vscode-remote.remote-wsl
rebornix.ruby
vscode-icons-team.vscode-icons
wingrunr21.vscode-ruby
CraigMaslowski.erb

OlivierJM

{
  "cSpell.words": [
    "dateutil", "refetch"
  ],
  "editor.formatOnPaste": true,
  // "editor.formatOnSave": true,
  "editor.formatOnType": true,
  "editor.fontFamily": "'Fira Code iScript', 'Fira Code', Consolas, 'Courier New', monospace",
  "editor.fontLigatures": true,
  "editor.tokenColorCustomizations": {

OlivierJM

# frozen_string_literal: true

module Mutations
  module Message
    # Updating message for the user
    class MessageUpdate < BaseMutation
      argument :id, ID, required: true

      field :message, Types::MessageType, null: true

OlivierJM

Rails Migration

http://guides.rubyonrails.org/migrations.html

Migrations methods:

• add_column
• add_index
• change_column
• change_table
• create_table
• drop_table

OlivierJM

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

OlivierJM

const { ApolloServer, gql } = require("apollo-server");
const jwt = require("jsonwebtoken");
const mongoose = require("mongoose");
const bcrypt = require("bcrypt");
const pick = require("lodash").pick;

// configure the user collection
const userSchema = mongoose.Schema({
  email: String,
  password: String

OlivierJM

const SECRET="createaverystrongsecretthatalsoincludes2423412wdsa324e34e"
const server = new ApolloServer({
  schema,
  context: ({ req }) => {
    const { user } = req
    // the user and secret we are passing here is what we access in every resolver 
    return {
      user,
      SECRET,