rayfix

extension UIImage {
  
  enum HEICError: Error {
    case heicNotSupported
    case cgImageMissing
    case couldNotFinalize
  }
  
  static var isHEICSupported: Bool = {
    let data = NSMutableData()

rayfix

    private static let toSuper: [Character: String] =   ["0": "\u{2070}",
                                                         "1": "\u{00B9}",
                                                         "2": "\u{00B2}",
                                                         "3": "\u{00B3}",
                                                         "4": "\u{2074}",
                                                         "5": "\u{2075}",
                                                         "6": "\u{2076}",
                                                         "7": "\u{2077}",
                                                         "8": "\u{2078}",
                                                         "9": "\u{2079}",

rayfix

struct Dice: Codable {
    var range: Range<Int>
    
    init<R: RangeExpression>(range expr: R) where R.Bound == Int {
        range  = expr.relative(to: Range<Int>(Int.min...Int.max-1))
    }
    
    
    func roll() -> Int {
        return Int.random(in: range)

rayfix

enum Result<Success, Failure: Error> {
    case success(Success)
    case failure(Failure)
    
    func get() throws -> Success {
        switch self {
        case .success(let success):
            return success
        case .failure(let failure):
            throw failure

rayfix

enum Coin {
    case heads
    case tails
    
    var isHeads: Bool {
        switch self {
        case .heads:
            return true
        case .tails:
            return false

rayfix

func compute(_ a: inout Int, _ b: inout Int) {
    b = 100
    a = 10
}

var x = 0
var y = 0

compute(&x, &y)

rayfix

import Foundation

extension String.StringInterpolation {
    
    private static let toSuper: [Character: String] =   ["0": "\u{2070}",
                                                         "1": "\u{00B9}",
                                                         "2": "\u{00B2}",
                                                         "3": "\u{00B3}",
                                                         "4": "\u{2074}",
                                                         "5": "\u{2075}",

rayfix

enum Direction {
  case north, east, south, west
  
  var left: Direction {
    switch self {
    case .north: return .west
    case .west: return .south
    case .south: return .east
    case .east: return .north
    }

rayfix

enum Direction {
  case north, east, south, west
  
  var left: Direction {
    switch self {
    case .north: return .west
    case .west: return .south
    case .south: return .east
    case .east: return .north
    }

rayfix

// The contingency table contains the support counts for each item
// in comparision with one another.

struct ContingencyTable {
    var bc: Int   // B and C
    var b_c: Int  // B and not C
    var _bc: Int  // not B and C
    var _b_c: Int // not B and not C