simrandotdev

Download Udemy course videos using youtube-dl

$ youtube-dl --list-extractors | grep udemy

Steps

1. Get link to the course to download. e.g. https://www.udemy.com/course-name/
2. Login into udemy website, save the cookie from chrome using Chrome (Cookie.txt)[1] export extension. Save it to file udemy-cookies.txt
3. Get the link of the video that you want to download. usually in format. Use the command provided below where you have to replace the {course_link} and {path_to_cookies_file} with respective paths.

# $ youtube-dl {course_link} --cookies {path_to_cookies_file}

simrandotdev

 override func viewWillTransition(to size: CGSize,
                                     with coordinator: UIViewControllerTransitionCoordinator) {
        if UIDevice.current.orientation.isLandscape {
            print("Landscape")
            chatButton.removeTarget(self, action: #selector(handleChatButtonClick), for: .touchUpInside)
        } else {
            print("Portrait")
            chatButton.addTarget(self, action: #selector(handleChatButtonClick), for: .touchUpInside)
        }
    }

simrandotdev

import Foundation
import SystemConfiguration.CaptiveNetwork

func getWiFiSsid() -> String? {
    var ssid: String?
    if let interfaces = CNCopySupportedInterfaces() as NSArray? {
        for interface in interfaces {
            if let interfaceInfo = CNCopyCurrentNetworkInfo(interface as! CFString) as NSDictionary? {
                ssid = interfaceInfo[kCNNetworkInfoKeySSID as String] as? String
                break

simrandotdev

Remove MySQL completely

1. Open the Terminal

2. Use mysqldump to backup your databases

3. Check for MySQL processes with: ps -ax | grep mysql

4. Stop and kill any MySQL processes

5. Analyze MySQL on HomeBrew:

brew remove mysql

simrandotdev

import UIKit

class ViewController: UIViewController {
    
    // TOP LEFT
    let view1 : UIView = {
        let view = UIView()
        view.translatesAutoresizingMaskIntoConstraints = false
        view.backgroundColor = .red
        return view

simrandotdev

extension Data {
    // Converts JSON data to specified object
    func fromJsonData<T : Decodable>(to type: T.Type) throws -> T {
        return  try JSONDecoder().decode(T.self, from: self)
    }
}

struct AccResponse : Codable {
    let acc: Acc

simrandotdev

fun main(args: Array<String>) {

    val simran = Person("Simran", "Singh")
    simran.greet()
    simran.completeAddress("Mohali", "Punjab",  zip = "160063", country = "India")
    // As the 'getCompleteAddress()' is returning an Optional String, we are using 'elvis' operator to check for
    // 'null' value, and if it is null than use some default method.
    println(simran.getCompleteAddress() ?: "Unknown")
    // Another way of doing this is using 'let' expression
    simran.getCompleteAddress().let {

simrandotdev

void main() {
  String name = 'Simran';
  int age = 28;
  final double height = 1.84; // You cannot change this variable as it is declared final
  var occupation = "Mobile App Developer";
  dynamic weight = 90;
  
  describe(name, age, height, occupation, weight);
  describe("Jassi", 29, 1.9, "Software Engineer");
  

simrandotdev

void main() {
	final square = Square(side: 10.0);
  print(square.area());
}

abstract class Shape {
  double area();
}

class Square implements Shape {

simrandotdev

Django Deployment to Ubuntu 18.04

In this guide I will go through all the steps to create a VPS, secure it and deploy a Django application. This is a summarized document from this digital ocean doc

Any commands with "$" at the beginning run on your local machine and any "#" run when logged into the server

Create A Digital Ocean Droplet

Use this link and get $10 free. Just select the $5 plan unless this a production app.