Truong Hoang Dung revskill10

We will first discussed how destructing and rest parameters can be used in ES6 - in arrays and objects. Then we will look at a few examples and also discuss some quiz.

arrays

var array = [1, 2, 3, 4];
var nestedArray = [1, 2, 3, 4, [7, 8, 9]];

var [a, b, c, d] = array;
console.log(a, b, c, d)

A state machine is defined as follows:

Input - a set of inputs
Output - a set of outputs
State - a set of states
S0 ∈ S - an initial state
T : Input * State -> Output * State - a transition function

If you model your services (aggregates, projections, process managers, sagas, whatever) as state machines, one issue to address is management of State. There must be a mechanism to provide State to the state machine, and to persist resulting State for subsequent retrieval. One way to address this is by storing State is a key-value store. Another way is to use a SQL database. Yet another way is event sourcing. The benefit of even sourcing is that you never need to store State itself. Instead, you rely on the Output of a service to reconstitute state. In order to do that, the state machine transition function needs to be factored into two functions as follows:

Frontend Masters—Deploying Full Stack: Node.js & React on AWS

You should have the following completed on your computer before the workshop:

Have Node.js installed on your system. (Recommended: Use nvm.)
- Unfortunately, you'll need to be on Node 9.x or earlier. Dependencies are hard and one of the dependencies of one of our dependencies is set to not allow Node 10.x.
- Install yarn with brew install yarn.
Create an AWS account. (This will require a valid credit card.)
Install multi-factor authentication app (e.g. Authy, Google Authenticator, Duo).
Install the AWS CLI. (brew install awscli should do the trick. Otherwise, you'll need Python and PIP, which you can install using brew install python.)

	// The classic AJAX call - dispatch before the request, and after it comes back
	function myThunkActionCreator(someValue) {
	return (dispatch, getState) => {
	dispatch({type : "REQUEST_STARTED"});

	myAjaxLib.post("/someEndpoint", {data : someValue})
	.then(
	response => dispatch({type : "REQUEST_SUCCEEDED", payload : response}),
	error => dispatch({type : "REQUEST_FAILED", error : error})
	);

	require_relative 'base'
	require_relative 'event'
	require_relative 'cmd'
	require_relative 'crud'
	require_relative 'model'
	require_relative 'read'

	require 'pp'

	class Application < BaseObject

	const webpack = require('webpack');

	require('dotenv').config({
	path: process.env.NODE_ENV === 'production' ? '.env.production' : '.env'
	});

	module.exports = {
	webpack: config => {
	const env = Object.keys(process.env).reduce((acc, curr) => {
	acc[`process.env.${curr}`] = JSON.stringify(process.env[curr]);

	const md5File = require('md5-file');
	const path = require('path');

	// CSS styles will be imported on load and that complicates matters... ignore those bad boys!
	const ignoreStyles = require('ignore-styles');
	const register = ignoreStyles.default;

	// We also want to ignore all image requests
	// When running locally these will load from a standard import
	// When running on the server, we want to load via their hashed version in the build folder

	CREATE EXTENSION IF NOT EXISTS pgcrypto WITH SCHEMA public;

	-- ----------------------------
	-- Table structure for events
	-- ----------------------------
	DROP TABLE IF EXISTS "public"."events";
	CREATE TABLE "public"."events" (
	"id" uuid DEFAULT gen_random_uuid() NOT NULL,
	"type" varchar NOT NULL COLLATE "default",
	"stream" varchar NOT NULL COLLATE "default",

	{-# LANGUAGE DataKinds, PolyKinds, TypeOperators #-}
	{-# LANGUAGE TypeFamilies, FlexibleInstances, ScopedTypeVariables #-}
	{-# LANGUAGE InstanceSigs #-}

	module TinyServant where

	import Control.Applicative
	import GHC.TypeLits
	import Text.Read
	import Data.Time

	{-
	$ curl -X POST localhost:9876/dog -v
	* Connected to localhost (127.0.0.1) port 9876 (#0)
	> POST /dog HTTP/1.1
	> Host: localhost:9876
	> User-Agent: curl/7.55.1
	> Accept: /
	>
	< HTTP/1.1 301 Moved Permanently
	< Transfer-Encoding: chunked