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#!/bin/bash

# Check if an argument (Swift file name) was provided
if [ "$#" -ne 1 ]; then
    echo "Usage: $0 <Swift File>"
    exit 1
fi

SWIFT_FILE=$1
BASE_NAME=${SWIFT_FILE%.*}

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MongoDB Cheat Sheet

Show All Databases

show dbs

Show Current Database

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import Vapor
import RediStack

/**
 
 The following is a routes file for a Vapor server that exposes two routes, "get" and "set", both of which accept query params.
 
 The "get" route returns the value of a given key if it exists, while the "set" route stores each provided key/value pair in a Redis cache.
 As per Vapor's conventions, the Redis configuration exists in the `Sources/App/Controllers/configure.swift` file which is not included in this Gist.
 

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fileprivate func removePreviousViewController() {
  guard let navigationController = self.navigationController else { return }

  let controllerToRemove = "ConfirmationViewController"
  var allControllers = navigationController.viewControllers

  for (index, controller) in allControllers.enumerated() {
      let name = String(describing: type(of: controller))
      if name == controllerToRemove {
          allControllers.remove(at: index)

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func fillOther(view: UIView) {
    NSLayoutConstraint.activate([
        leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor),
        trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor),
        topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor),
        bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor)
    ])
}

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// UIViewController extension to get root VC
func getRootViewController(of nestedViewController: UIViewController) -> UIViewController? {
  return nestedViewController.view.window?.rootViewController
}

// In use inside non-root VC
let vc = UINavigationController(rootViewController: CurrencySelectorViewController(type: type))
vc.modalPresentationStyle = .overFullScreen

if let root = getRootViewController(of: self) {

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func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
  guard let scene = (scene as? UIWindowScene) else { return }

  let vc = ViewController()
  let nc = UINavigationController(rootViewController: vc)

  window = UIWindow(frame: scene.coordinateSpace.bounds)
  window?.windowScene = scene
  window?.rootViewController = nc
  window?.makeKeyAndVisible()

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// ExchangeRate API Supported Currencies
const currencies = {
   "AED": {
      "FIELD2": "UAE Dirham",
      "FIELD3": "United Arab Emirates"
   },
   "AFN": {
      "FIELD2": "Afghan Afghani",
      "FIELD3": "Afghanistan"
   },

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Containerizing a Node App & Creating an Image Repo on ECR

What and Why

This document assumes you already have Docker installed and likewise are familiar with its use-cases. In essence, Docker is used to package our applications as standardized executable components (containers) that combine application source code with all the operating system libraries and dependencies required to run the code in any (typically cloud) environment(s).

There are many benefits to this, and there are likewise many caveats. Refer to Google to learn more.

Creating node-test

You should already know how to create a simple Node app with a single endpoint, but if you don't...

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IAC with Terraform

What and Why

• Terraform is a tool used for building, changing, and versioning infrastructure safely and efficiently
  • It supports many service providers, likewise one could roll their own custom or in-house solutions
  • IAC is defined using high-level languages HCL and good ol' JSON
    • We'll start with HCL later on as it's more commonly used for these purposes
• Sysadmins used to purchase hardware, set up servers with network and software, and also maintain/modify them manually
  • Repetitive and time consuming
• By definition, IAC is the process of managing and provisioning infrastructure through code instead of physical hardware configuration and interactive configuration tools