David Katz 15Dkatz

## installing_postgresql.md

      
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                15Dkatz
                / installing_postgresql.md
            
            
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              December 25, 2023 06:29
            
              
                PostgreSQL installation tutorial
              
          
    Let's install PostgreSQL onto your operating system.

As an open source object-relational database management system, PostgreSQL available for MacOS, Linux, and Windows.
Goal for each Operating System

The goal will be to run the following command successfully from the command line (regardless of the OS):
psql -U postgres
This should open the psql interactive shell and print a prompt that looks like:

  
## express-cors-proxy-server.example.js
const express = require('express');
const request = require('request');

const app = express();

app.use((req, res, next) => {
  res.header('Access-Control-Allow-Origin', '*');
  next();
});

## index.html
<!doctype html>
<html>
  <body>
    <div id="root"></div>
    <script src="index.js"></script>
  </body>
</html>

## cloneDeep.js
const cloneDeep = source => {
 const result = {};

 Object.entries(source).forEach(entry => {
   const [key, value] = entry;

   if (typeof value === 'object') {
     result[key] = cloneDeep(value);
   } else {
     result[key] = value;

## CourseDiscounts.md

      
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                15Dkatz
                / CourseDiscounts.md
            
            
              Last active
              April 20, 2019 06:42
            
              
                List of discounts for courses taught by David Katz
              
          
    Udemy Course Discounts

React, Security, & Full-Stack Auth with Node and PostgreSQL | Discount
https://www.udemy.com/react-security/?couponCode=REASECPRO

Build a Blockchain and a Cryptocurrency from Scratch | Discount
https://www.udemy.com/build-blockchain/?couponCode=BLOCKCHAINPRO

  
## selections.txt
Weiner (2016) - Josh Lam [March 17, 2017]
Rumble in the Bronx (1995) - Josh Lam [March 24, 2017]
Grey Gardens (1975) - Kristina Garfinkel [March 31, 2017]
Real Genius (1985) - Alex Stone [April 7, 2017]
Trainspotting (1996) - Kristen Mirenda [April 14, 2017]
Mulholland Drive (2001) - Craig Little [April 21, 2017]
Blue Velvet (1986) - Kristen Mirenda [April 28, 2017]
Dear Zachary: A Letter to a Son About His Father (2008) - Josh Lam [May 5, 2017]
One Flew Over the Cuckoo's Nest (1975) - Kristina Garfinkel [May 12, 2017]
The Man from Earth (2007) - Sujay Sudheendra [May 26, 2017]

## initial-game-state.js
const INITIAL_GAME_STATE = { victory: false, startTime: null, endTime: null };
const [snippet, setSnippet] = useState('');
const [userText, setUserText] = useState('');
const [gameState, setGameState] = useState(INITIAL_GAME_STATE);

## victory-jsx.js
  {snippet}
  <h4>{gameState.victory ? `Done! 🎉 Time: ${gameState.endTime}ms` : null}</h4>
  <input value={userText} onChange={updateUserText} />

## traditional-typerace.js
class App extends React.Component {
 state = { userText: '' };

 updateUserText = event => {
   this.setState({ userText: event.target.value });
   console.log('current userText', this.state.userText);
 }

 render() {
   return (

## Parcel-react-jest - App.test.js
import React from 'react';
import { shallow } from 'enzyme';
import App from './App';

describe('App', () => {
  const app = shallow(<App />);

  it('renders the title', () => {
    expect(app.find('h1').exists()).toBe(true);
  });
	const express = require('express');
	const request = require('request');

	const app = express();

	app.use((req, res, next) => {
	res.header('Access-Control-Allow-Origin', '*');
	next();
	});
	<!doctype html>
	<html>
	<body>
	<div id="root"></div>
	<script src="index.js"></script>
	</body>
	</html>
	const cloneDeep = source => {
	const result = {};

	Object.entries(source).forEach(entry => {
	const [key, value] = entry;

	if (typeof value === 'object') {
	result[key] = cloneDeep(value);
	} else {
	result[key] = value;
	Weiner (2016) - Josh Lam [March 17, 2017]
	Rumble in the Bronx (1995) - Josh Lam [March 24, 2017]
	Grey Gardens (1975) - Kristina Garfinkel [March 31, 2017]
	Real Genius (1985) - Alex Stone [April 7, 2017]
	Trainspotting (1996) - Kristen Mirenda [April 14, 2017]
	Mulholland Drive (2001) - Craig Little [April 21, 2017]
	Blue Velvet (1986) - Kristen Mirenda [April 28, 2017]
	Dear Zachary: A Letter to a Son About His Father (2008) - Josh Lam [May 5, 2017]
	One Flew Over the Cuckoo's Nest (1975) - Kristina Garfinkel [May 12, 2017]
	The Man from Earth (2007) - Sujay Sudheendra [May 26, 2017]
	const INITIAL_GAME_STATE = { victory: false, startTime: null, endTime: null };
	const [snippet, setSnippet] = useState('');
	const [userText, setUserText] = useState('');
	const [gameState, setGameState] = useState(INITIAL_GAME_STATE);
	{snippet}
	<h4>{gameState.victory ? `Done! 🎉 Time: ${gameState.endTime}ms` : null}</h4>
	<input value={userText} onChange={updateUserText} />
	class App extends React.Component {
	state = { userText: '' };

	updateUserText = event => {
	this.setState({ userText: event.target.value });
	console.log('current userText', this.state.userText);
	}

	render() {
	return (
	import React from 'react';
	import { shallow } from 'enzyme';
	import App from './App';

	describe('App', () => {
	const app = shallow(<App />);

	it('renders the title', () => {
	expect(app.find('h1').exists()).toBe(true);
	});