Paul paulwongx

postgreSQL commands

Source: https://www.youtube.com/watch?v=qw--VYLpxG4

List databses

\l

Create database

Turborepo

Creating a new app with tailwindcss

cd apps
npx create-next-app@latest
Add globals.css inside apps
Change .eslintrc.json to .eslintrc.js

module.exports = {
  root: true,

Git Commands

# Checking out a new branch
git checkout -b <branch-name>
git checkout -b feature/my-feature

# Commiting a branch
git add .
git commit -m "Your commit message here"
git push origin <branch-name>

Object Oriented Programming

SOLID Principles

Single Responsibility Principle (SRP)
Open/Closed Principle (OCP)
Liskov Substitution Principle (LSP)
Interface Segregation Principle (ISP)
Dependency Inversion Principle (DIP)

-- CQLSH

-- creating keyspace
CREATE KEYSPACE dev_db WITH replication = {'class': 'SimpleStrategy', 'replication_factor': '1'} AND durable_writes = 'true';

-- consistency
CONSISTENCY; -- Current consistency level is LOCAL_QUORUM.
CONSISTENCY ONE; -- OK for one node
CONSISTENCY QUORUM; -- Best for multiple nodes at high replication factor of ~3

	// This file adds coloring to the announcements to make it easier to read and understand what's going on

	import {
	DragCancelEvent,
	DragEndEvent,
	DragMoveEvent,
	DragOverEvent,
	DragStartEvent,
	useDndMonitor,
	} from "@dnd-kit/core";

	{
	"Version": "2012-10-17",
	"Statement": [
	{
	"Sid": "VisualEditor0",
	"Effect": "Allow",
	"Action": [
	"s3:GetObjectAcl",
	"s3:GetObject",
	"s3:DeleteObject",

	<div class="flex h-screen w-full flex-col bg-green-50">
	<div class="h-[72px] w-full bg-green-100">Header</div>

	<div id="body" class="flex flex-row">
	<div id="sidebar" class="flex-0 scrollbar h-[calc(100vh-72px)] w-64 bg-green-200 flex flex-col">
	<div id="top-sidebar" class="flex flex-col bg-red-50">
	<div>Menu 1</div>
	<div>Menu 2</div>
	<div>Menu 3</div>
	</div>

	name: Deploy

	on:
	push:
	branches:
	- main

	jobs:
	deploy:
	runs-on: ubuntu-latest

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<meta http-equiv="X-UA-Compatible" content="IE=edge">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>Video Camera</title>
	<!-- Load TensorFlow.js. This is required to use coco-ssd model. -->
	<script defer src="https://cdn.jsdelivr.net/npm/@tensorflow/tfjs"> </script>
	<!-- Load the coco-ssd model. -->