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

//
//  CapturedImageSampler.swift
//  ARKitTest
//
//  Created by Joshua Sullivan on 9/22/17.
//  Copyright © 2017 Joshua Sullivan. All rights reserved.
//

import UIKit
import ARKit

JoshuaSullivan

//
//  JTSSwiftTweener.swift
//  JTSSwiftTweener
//
//  Created by Joshua Sullivan on 12/10/16.
//  Copyright © 2016 Josh Sullivan. All rights reserved.
//

import UIKit

JoshuaSullivan

import Foundation

/// A type that can be initialized from a string value.
///
public protocol StringInitable {
    /// Initialize the object with a string.
    ///
    /// - Note: This operation can fail if the string is not valid for this object type.
    ///
    init?(_ string: String)

JoshuaSullivan

=========================
Color Absolute Difference
=========================

[Availability]
	  iOS: 14
	macOS: 11.0

[Categories]
	Color Adjustment, Video, Interlaced, Non-Square Pixels, Still Image, Built-In

JoshuaSullivan

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

JoshuaSullivan

import UIKit
import NaturalLanguage
import PlaygroundSupport

//: Your secret API key from `https://dictionaryapi.com` goes here.
//: THIS WON'T WORK UNLESS YOU GET A KEY.
let thesaurusKey = ""

//: The string you want to work on.
var testString = "The bright sun set behind the green hills. Thin clouds streaked the red sky."

JoshuaSullivan

//: # Setting up Swift 4 KVO
import Foundation

//: This class has a pair of properties that can be observied by KVO.
//: - Note: This class *must* inheret from `NSObject` in order to posess the KVO functionality.
class ObservableClass: NSObject {
    
    /// An observable string property. Note that it most be annotated with both "@objc" (expose the property to the
    /// Objective-C runtime) and "dynamic" (enables KVO for the property).
    @objc dynamic private(set) var stringProperty: String = "Starting string!"

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

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]