StevenMasini

class Permutator {
    class func permutation(_ str: String) -> Set<String> {
        return permutation(str, prefix: "")
    }
    
    private class func permutation(_ str: String, prefix: String) -> Set<String> {
        if str.characters.count == 0 {
            return [prefix]
        }
        

StevenMasini

func quicksort<T: Comparable>(_ arr: [T]) -> [T] {
  guard arr.count > 1 else {
    return arr
  }
  
  let pivot = arr[arr.count / 2]
  var left  = [T]()
  var equal = [T]()
  var right = [T]()
  

StevenMasini

import Foundation

public struct Log {
    fileprivate enum Tag: String {
        case verbose    = "🔷"
        case success    = "✅"
        case warning    = "⚠️"
        case error      = "🚫"
        case json       = "📦"
    }

StevenMasini

extension UIColor {
    /// Init a UIColor base on the color hexadecimal value
    ///
    /// - Parameters:
    ///   - hex: Hexadecimal code of the color
    ///   - alpha: Alpha opacity, between 0 and 1
    public convenience init(hex: UInt, alpha: CGFloat) {
        self.init(
            red:    CGFloat((hex & 0xFF0000) >> 16) / 255.0,
            green:  CGFloat((hex & 0x00FF00) >> 8) / 255.0,

StevenMasini

extension UIView {
  /// Load a view from a nib file and return it.
  /// The Class and the Nib file must have the same name.
  /// The nib file should contain only one view.
  ///
  /// - Returns: The first view found in the nib file.
  static func loadInstanceFromNib<T: UIView>() -> T? {
        return Bundle.main.loadNibNamed(String(describing: classForCoder()), owner: self, options: nil)?[0] as? T
    }
}

StevenMasini

import Foundation

func generateRandomDate(daysBack: Int)-> Date?{
    let day = arc4random_uniform(UInt32(daysBack))+1
    let hour = arc4random_uniform(23)
    let minute = arc4random_uniform(59)
    
    let today = Date(timeIntervalSinceNow: 0)
    let gregorian  = NSCalendar(calendarIdentifier: NSCalendar.Identifier.gregorian)
    var offsetComponents = DateComponents()

StevenMasini

import Foundation
import NearbyInteraction
import MultipeerConnectivity
import Combine

var numberFormatter: NumberFormatter {
    let numberFormatter = NumberFormatter()
    numberFormatter.roundingMode = .halfEven
    numberFormatter.maximumFractionDigits = 3
    numberFormatter.minimumFractionDigits = 3