rmiyazaki6499

Deploying a Production ready React-Express app on AWS

In this tutorial, I will be going over to how to deploy a Javascript app from start to finish using AWS and EC2. Recently, my partner Tu and I launched our app AlgoAcademy (a resource for reviewing algorithms and data structures) and we wanted to share with other developers some of the lessons we learned along the way.

Following this tutorial, you will have an application that has:

• A React frontend, Express backend
• An AWS EC2 server configured to host your application
• SSL-certification with Certbot
• A custom domain name

costrouc

Practice Exam Attempt (3) Carefully taken with notes

Got an 16/20 on the latest practice exam. Missed questions 5, 7, 12, 13.

Summary of why missed each question:

5

always favor simpler method (cbt (cloud big query tool) vs hbase cli) … I feel uneasy with this answer

7

prefer simpler method. pub/sub more than capable. kafka is overkill. this question showed my lack of knowledge of pub/sub capabilities

akiatoji

In GCP Console, create VPC networks named vpn-1 and vpn-2 in us-east1 and europe-west1

In Cloud Shell:

Create VPN gateways

gcloud compute target-vpn-gateways \
create vpn-1 \

pydevops

• 0.1. References
• 0.2. Other cheatsheets
• 0.3. Manage multiple gcloud config configurations
  • 0.3.1. Switch gcloud context with gcloud config
• 0.4. Credentials
• 0.5. info
• 0.6. projects
• 0.7. zones & regions
• 0.8. Organization
• 0.9. billing

toddhopkinson

// You have a very very large video file you need to upload to a server while your app is backgrounded.
// Solve by using URLSession background functionality. I will here use Alamofire to enable multipart upload.

class Networking {
  static let sharedInstance = Networking()
  public var sessionManager: Alamofire.SessionManager // most of your web service clients will call through sessionManager
  public var backgroundSessionManager: Alamofire.SessionManager // your web services you intend to keep running when the system backgrounds your app will use this
  private init() {
    self.sessionManager = Alamofire.SessionManager(configuration: URLSessionConfiguration.default)
    self.backgroundSessionManager = Alamofire.SessionManager(configuration: URLSessionConfiguration.background(withIdentifier: "com.lava.app.backgroundtransfer"))

eklimcz-zz

function calculateDistance(rssi) {
  
  var txPower = -59 //hard coded power value. Usually ranges between -59 to -65
  
  if (rssi == 0) {
    return -1.0; 
  }

  var ratio = rssi*1.0/txPower;
  if (ratio < 1.0) {

rtt

Tinder API documentation

Note: this was written in April/May 2014 and the API may has definitely changed since. I have nothing to do with Tinder, nor its API, and I do not offer any support for anything you may build on top of this. Proceed with caution

http://rsty.org/

I've sniffed most of the Tinder API to see how it works. You can use this to create bots (etc) very trivially. Some example python bot code is here -> https://gist.github.com/rtt/5a2e0cfa638c938cca59 (horribly quick and dirty, you've been warned!)

nathan-osman

# A simple CMake script for building the application.
cmake_minimum_required(VERSION 2.8)
project(create-x509)

# Our only dependency is OpenSSL
find_package(OpenSSL REQUIRED)

include_directories(${OPENSSL_INCLUDE_DIR})

add_executable(create-x509 create-x509.cpp)