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{
    "results": [
        {
            "gender": "male",
            "name": {
                "title": "Monsieur",
                "first": "Alfonso",
                "last": "Rolland"
            },
            "location": {

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Swift Fundamental Topics

• The Basics: assertions (only in dev), preconditions (in dev and prod)
• Basic Operators (+, -, *, /, ==, >=, <=, ||, &&, ..., ..<)
• Strings and Characters
• Colleciton Types (Array, Sets, Dictionaries, KeyValuePairs)
• Control Flow
• Functions: defer, inout, subscript
• Closures: callbacks
• Enumerations

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//
//  main.swift
//  Stack
//
//  Created by Alex Paul on 10/6/20.
//

import Foundation

struct Stack<T> {

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//  Created by Alex Paul on 9/16/20.
//  Copyright © 2020 Alex Paul. All rights reserved.
//

import Foundation

// Reverse a singly linked list.

class Node {
  var value: Int

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import Foundation 

func add(a: Int, b: Int) -> Int {
  return a + b 
}

while true {
  print("enter a")
 let a = Int(readLine() ?? "") ?? 0

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// Making sections for a 2D array to be used in a CollectionView or TableView. [Fellow] => [[Fellow]]

import Foundation

struct Fellow {
  let name: String
  let cohort: String
  
  static func allFellows() -> [Fellow] {
    return [

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import Foundation
import Combine

let publisherArr = [1.0, 2.0, 3.0, 4.0, 5.0, 6.0].publisher

// publisher is of type Publishers.Sequence<[Double], Never>

// the generic type here takes two arguments <Output, Failure>

// in this case the our publisherArr will "Never" fail.

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import SwiftUI

struct ContentView: View {
  @State private var scale: CGFloat = 1
  var body: some View {
    Button(action: {
      withAnimation(.easeIn(duration: 1)) {
        self.scale += 20
      }
      DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {

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import Combine

class Event {
  @Published var calendarYear = 2020 // initial value
}


let event = Event() // new instance of Event

event.$calendarYear

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JSON Cheatsheet

1. Working with JSON where the root level is ONE dictionary

let jsonDict = """
{
 "results": [
   {
     "firstName": "John",