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A

B

C

D

E

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Steps to create a local repo on your machine using Terminal and push to Github

Create Folder in Terminal

1. mkdir "ProjectFolder"

Github.com

1. Navigate to Github.com and create a new repository
2. Enter the repo name

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Terminal Commands

Command	Summary
cd ~/Documents	navigate to the documents directory of your mac
pwd	show current directory
ls	list contents of current directory
mkdir GitIntro	create a folder named GitIntro
cd GitIntro	navigate to the newly created GitIntro folder
echo "Github Introduction" >> README.md	create a markdown file called README.md

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Git Commands

Command	Summary
git init	initializes (creates) a git repository in the current directory
ls -a	list hidden files
git status	show status of your local repository
git add README.md	add the untrack file to be committed
git commit -m "initial commit"	commit and include a message about your commit
git remote add origin ``	configure the remote repository

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Bash

What is a bash_profile

There is a hidden file in your Mac’s user directory named .bash_profile. This file is loaded before Terminal loads your shell environment and contains all the startup configuration and preferences for your command line interface. Within it you can change your terminal prompt, change the colors of text, add aliases to functions you use all the time, and so much more.

Creating a .bash_profile

If you run the open ~/.bash_profile command and do not have a current .bash_profile, follow these steps to create one:

1. Open Terminal

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Steps to capture video for App Store preview

1. Use Quicktime to capture the app running on an iOS device
2. Use ffmpeg to adjust the frame rate to the required 30 fps.
3. Don't have ffmpeg? Install using homebrew > brew install ffmpeg
4. ffmeg command > ffmpeg -i input.mov -r 30 output.mov

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// Apple Documentation: https://developer.apple.com/documentation/swift/uint64/2885895-addingreportingoverflow
let intMin = Int.min // -9223372036854775808
let intMax = Int.max // 9223372036854775807
print(intMin)
print(intMax)

if case let (result, overflow) = intMax.addingReportingOverflow(1), !overflow {
  print(result)
} else {
  print("overflow while trying to add to Int.max")

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// Date extension
extension Date {
  static func getStringFromDate(date: Date) -> String {
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = "EEEE, MMM d, yyyy"
    let dateString = dateFormatter.string(from: date)
    return dateString
  }
  static func getDateFromString(dateString: String) -> Date? {
    let formatter = ISO8601DateFormatter()

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// working with String index

let str = "The Swift Programming Language"

// accessing the first character
print("the first character is \(str[str.startIndex])")

// accessing the last character
print("the last character is \(str[str.index(before: str.endIndex)])")

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class ViewController: UIViewController {
  @IBOutlet weak var tableView: UITableView!

  private var cities = ["new york", "boston", "chicago", "stockholm"]
  
  override func viewDidLoad() {
    super.viewDidLoad()
  }
  
  override func prepare(for segue: UIStoryboardSegue, sender: Any?) {