JoshuaSullivan

// Improved Noise - Copyright 2002 Ken Perlin.
// Adapted and updated for iOS by Joshua Sullivan, 2016.01.12

// Apply the function 6t^5 - 15t^4 + 10t^3
float fade(float t)
{
    return t * t * t * (t * (t * 6.0 - 15.0) + 10.0);
}

// I'm keeping this around for reference.

JoshuaSullivan

// This works.
kernel vec4 simpleFilter(sampler p)
{
  vec2 dc = destCoord();
  return sample(p, samplerTransform(p, dc));
}

// This does not. It produces [0, 0, 0, 255] for the first 255 pixels and then [0, 0, 0, 0] thereafter.
kernel vec4 simpleFilter(sampler p)
{

JoshuaSullivan

import Foundation
import QuartzCore

public func testWithMultipleInstantiation() -> CFTimeInterval {
    var dateStrings: [String] = []
    dateStrings.reserveCapacity(100000)
    let start = CACurrentMediaTime()
    for _ in 0..<100000 {
        let df = NSDateFormatter()
        df.dateStyle = .MediumStyle

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

//: # RepeatingSequence

import Swift
import Foundation

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>

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

let baseString = "/Documents/"
let words = ["Alpha", "Beta", "Gamma", "Delta"]
var paths : [String] = []

for (var i = 0; i < words.count; ++i) {
    let word = words[i]
    paths.append("\(baseString)\(word)")
}
print(paths)

JoshuaSullivan

enum NotificationNames: String {
  case UserDataChanged: "UserDataChangedNotificationName"
  case ReceivedAlert: "ReceivedAlertNotificationName"
  case PeanutButterJellyTime: "ItsPeanutButterJellyTimeNotificationName"
}

JoshuaSullivan

UIActivityIndicatorView

@property (nullable, readwrite, nonatomic, strong) UIColor *color NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;

UIBarButtonItem

- (void)setBackgroundImage:(nullable UIImage *)backgroundImage forState:(UIControlState)state barMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;

- (nullable UIImage *)backgroundImageForState:(UIControlState)state barMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;

JoshuaSullivan

import Foundation

@objc(<$managedObjectClassName$>)
public class <$managedObjectClassName$>: _<$managedObjectClassName$> {

	// Custom logic goes here.

}