JoshuaSullivan

/// The RepeatingSequence accepts a collection and returns the values sequentially until the
/// final element is returned, at which point the sequence wraps around to the first element
/// of the collection and continues from there.
struct RepeatingSequence<T>: Sequence {
    
    /// The Collection that we base our sequence on. We use a Collection and not
    /// another Sequence because Sequences are not guaranteed to be repeatedly iterated.
    let data: AnyCollection<T>
    
    /// We can optionally specify a maximum number of iterations. This is necessary

JoshuaSullivan

import Foundation

public struct ObfuscationDecoder {
    
    public enum DeobfuscationError: Error {
        case invalidStringBytes
    }
    
    /// The multi-byte nonce used to encode strings.
    private static let nonce: [UInt8] = [199, 152, 254, 45, 85, 241, 134, 185, 22, 249, 182, 208, 43, 176, 143, 252]

JoshuaSullivan

//: # Protocols and Inheritance
//: This playground demonstrates a gotcha in the use of protcols with default
//: method implementations along with class inheritance.
import UIKit

//: This protocol defines a single method that takes an `Int` and returns an `Int`.
protocol Doable {
    func doSomething() -> Int
}

JoshuaSullivan

//
//  ColorCubeHelper.swift
//
//  Created by Joshua Sullivan on 10/01/16.
//  Copyright © 2016 Joshua Sullivan. All rights reserved.
//

import UIKit
import Accelerate

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

JoshuaSullivan

//
//  ColorCubeImageCreator.swift
//  ColorCubeImageCreator
//
//  Created by Joshua Sullivan on 4/25/16.
//  Copyright © 2016 Joshua Sullivan. All rights reserved.
//

import UIKit

JoshuaSullivan

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

import UIKit
import MetalKit

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

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

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;