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Machine({
  id: 'AuthorizeDevice',
  initial: 'chooseMethod',
  states: {
    chooseMethod: {
      on: {
        CHOOSE_ADD_DEVICE: 'addDeviceForm',
      }
    },
    addDeviceForm: {

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Machine({
  id: 'AuthorizeDevice',
  initial: 'chooseMethod',
  states: {
    chooseMethod: {
      on: {
        CHOOSE_ALLOW_ONCE: 'allowOnceToken',
        CHOOSE_ADD_DEVICE: 'addDeviceForm',
        CHOOSE_LOGOUT: 'loggedOut',
      }

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// CORRECT SUBMIT EVENT:
// {
//   "type": "SUBMIT",
//   "password": "1234"
// }

// pure mocks

const delay = (time) => {
  return new Promise((res, rej) => {

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{
  "type": "object",
  "properties": {
    "orderId": {
      "type": "string",
      "faker": "random.uuid"
    },
    "customer": {
      "type": "string",
      "faker": "name.findName"

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import { INC } from './constants';

export const Inc = () => ({
  type: INC as typeof INC
})

export type Actions =
  | ReturnType<typeof Inc>

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Functional Composition with Static Types in TypeScript

• snippets from live coding session
• Tomasz Ducin, @tomasz_ducin
• Wrocław TypeScript #3, 2019.03.27

ducin

Functional Composition with Static Types in TypeScript

• snippets from live coding session
• Tomasz Ducin, @tomasz_ducin
• Warsaw TypeScript #2, 2019.02.06

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Lorem Ipsum License

Copyright (c) [year] [fullname]

Permission is Lorem ipsum hereby granted, dolor sit amet, free of charge,
to any person obtaining a copy consectetur adipiscing elit. Proin nibh augue
of this software and associated documentation files (the "Software"),
suscipit a, scelerisque sed, to deal lacinia in, mi. Cras vel lorem.
Etiam pellentesque aliquet tellus, in the Software without restriction,
Phasellus pharetra nulla ac diam. Quisque semper justo at risus including

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node_modules

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const API_URL = 'http://localhost:3011/'

const OfficeModel = {
  getCollection(){
    return fetch(`${API_URL}offices`)
      .then(res => res.json())
  },
  async __extendOfficeWithEmployees(office){
    const employees = await EmployeeModel.getCollection(office.city)
    return { ...office, employees }