farhadjaman

Node.js Deployment

Steps to deploy a Node.js app to DigitalOcean using PM2, NGINX as a reverse proxy and an SSL from LetsEncrypt

1. Create Free AWS Account

Create free AWS Account at https://aws.amazon.com/

2. Create and Lauch an EC2 instance and SSH into machine

I would be creating a t2.medium ubuntu machine for this demo.

farhadjaman

import { OpenAI } from 'langchain/llms/openai'
import { PromptTemplate } from 'langchain/prompts'
import { loadQARefineChain } from 'langchain/chains'
import { MemoryVectorStore } from 'langchain/vectorstores/memory'
import { OpenAIEmbeddings } from 'langchain/embeddings/openai'

import {
  StructuredOutputParser,
  OutputFixingParser,
} from 'langchain/output_parsers'

farhadjaman

import React, { useState, useEffect } from 'react';
import VideoPlayer from './VideoPlayer'; // Import your VideoPlayer component

const Create = () => {
  const [watchVideo, setWatchVideo] = useState(false);
  const [startTime, setStartTime] = useState(null);
  const [elapsedTime, setElapsedTime] = useState(0);

  useEffect(() => {
    let interval; // Store the interval ID

farhadjaman

import { useState, useEffect } from 'react';

const TestStateChangeTime = ({}) => {
  const [elapsedTime, setElapsedTime] = useState(0);
  const [isModalOpen, setIsModalOpen] = useState(false);

  const handleButtonClick = () => {
    setIsModalOpen(!isModalOpen);
  };

farhadjaman

#nginx config file for Nextjs App
#place in /etc/nginx/sites-available/name_of_config_file
server {
        listen 80;
        server_name domainname.com;

        gzip on;
        gzip_proxied any;
        gzip_types application/javascript application/x-javascript text/css text/javascript;
        gzip_comp_level 5;

farhadjaman

function findNestedObject(object, keyToFind, valToFind) {
	let foundObj;
	JSON.stringify(object, (_, nestedValue) => {
		if (nestedValue && nestedValue[keyToFind] === valToFind) {
			foundObj = nestedValue;
		}
		return nestedValue;
	});
	return foundObj;
}

farhadjaman

GraphQL Queries & Mutations

These are the GraphQL queries and mutations for the YouTube course.

Get names of all clients

{
  clients {
    name
 }

farhadjaman

const debug = require('debug')('steve');


debug('variable value... through debug');
//console.log('variable value... through console.');
let arr = [].fill(123, 0, 10000);
let arr2 = new arr.map(item => item * 10); // needed `new` in front of Array
debug('after the loop');

farhadjaman

// Place your key bindings in this file to override the defaults
[
  { "key": "cmd+1", "command": "workbench.action.openEditorAtIndex1" },
  { "key": "cmd+2", "command": "workbench.action.openEditorAtIndex2" },
  { "key": "cmd+3", "command": "workbench.action.openEditorAtIndex3" },
  { "key": "cmd+4", "command": "workbench.action.openEditorAtIndex4" },
  { "key": "cmd+5", "command": "workbench.action.openEditorAtIndex5" },
  { "key": "cmd+6", "command": "workbench.action.openEditorAtIndex6" },
  { "key": "cmd+7", "command": "workbench.action.openEditorAtIndex7" },
  { "key": "cmd+8", "command": "workbench.action.openEditorAtIndex8" },