JoshuaSullivan

let inputDictionary = [
    "author_name": "Robert Jordan",
    "book_title": "Knife of Dreams",
    "series": "The Wheel of Time, Book 11",
    "publisher": "Tor Fantasy",
    "published_date": "November 28, 2006"
]

let sortedKeys = inputDictionary.keys.array.sorted(<)
var queryTerms = Array<String>()

JoshuaSullivan

//: # Lazy Instantiation
//:
//: This playground demonstrates situations where lazily instantiating properties is valuable.
//: **NOTE:** This is a Swift 2.0 playground and must be opened in Xcode 7.

import UIKit
import CoreImage

//: A helper function to produce a random CGFloat in the range 0..<1
func randomCGFloat() -> CGFloat {

JoshuaSullivan

func attemptLogin(user: String, password: String) {
    self.loginRequest = APIClient.sharedClient().createLoginRequest(user:user, password:password) {
        result in
        switch result {
            case .Success(let data):
                parseLoginData(data) // Compiler error: implicit reference to self
            case .Failure(let error):
                errorHandlingMethod(error) // Compiler error: implicit reference to self
        }
    }

JoshuaSullivan

class MyClass {
    @IBOutlet weak var outputLabel: UILabel! {
        didSet {
            // Ensure that the label wasn't just set to nil.
            guard let outputLabel = self.outputLabel else { return }
            
            // Set the text color based on the user's style choices.
            outputLabel.textColor = StyleManager.sharedManager().outputLabelColor
            
            // Set the label to use fixed-width numbers.

JoshuaSullivan

class TouchCaptureControl: UIControl {
    var value: CIVector = CIVector(x: 0.0, y: 0.0)
    
    @IBInspectable var horizontalMinimumValue: CGFloat = 0.0
    @IBInspectable var horizontalMaximumValue: CGFloat = 1.0
    @IBInspectable var verticalMinimumValue: CGFloat = 0.0
    @IBInspectable var verticalMaximumValue: CGFloat = 1.0
    
    @IBInspectable var flipHorizontalAxis: Bool = false
    @IBInspectable var flipVerticalAxis: Bool = false

JoshuaSullivan

class SingleWave {
  
  float SEGMENTS_PER_CYCLE = 48.0;
  
  float wavelength, r, dr;
  color drawColor;
  
  SingleWave(float wavelength, color drawColor) {
    this.wavelength = wavelength;
    this.drawColor = drawColor;

JoshuaSullivan

static float FOCAL_LENGTH = 200.0;
static float ORBIT_RADIUS = 180.0;
static int SPARK_COUNT = 200;

class Spark {
  color clr;
  float orbitRadius;
  float rx, ry, rz, drx, dry, drz;
  Spark(color c, float orbitRadius) {
    this.clr = c;

JoshuaSullivan

import Swift

/// This method returns half of the input value if the number is even. It returns nil if the number is odd.
func evenHalfOrNil(input: Int) -> Int? {
    if (input % 2 == 0) {
        return input / 2
    } else {
        return nil
    }
}

JoshuaSullivan

//
//  ViewController.swift
//  MetalCoreImage
//
//  Created by Joshua Sullivan on 4/21/16.
//  Copyright © 2016 The Nerdery. All rights reserved.
//

import UIKit
import MetalKit

JoshuaSullivan

//: # Challenge Accepted #49
//: ## WUnderground API Client
//: ### Version 2.0
//:
//: Implement the networking layer for the Umbrella weather app(iOS or Android),
//: using a similar architecture to the one demonstrated in the first episode of Swift Talks.
//:
//: - note:
//: This is my updated solution to the challenge which demonstrates a more powerful and flexible
//: approach to customizing the request sent to the API through the use of closures rather than