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public func CVPixelBufferGetPixelFormatName(pixelBuffer: CVPixelBuffer) -> String {
    let p = CVPixelBufferGetPixelFormatType(pixelBuffer)
    switch p {
    case kCVPixelFormatType_1Monochrome:                   return "kCVPixelFormatType_1Monochrome"
    case kCVPixelFormatType_2Indexed:                      return "kCVPixelFormatType_2Indexed"
    case kCVPixelFormatType_4Indexed:                      return "kCVPixelFormatType_4Indexed"
    case kCVPixelFormatType_8Indexed:                      return "kCVPixelFormatType_8Indexed"
    case kCVPixelFormatType_1IndexedGray_WhiteIsZero:      return "kCVPixelFormatType_1IndexedGray_WhiteIsZero"
    case kCVPixelFormatType_2IndexedGray_WhiteIsZero:      return "kCVPixelFormatType_2IndexedGray_WhiteIsZero"
    case kCVPixelFormatType_4IndexedGray_WhiteIsZero:      return "kCVPixelFormatType_4IndexedGray_WhiteIsZero"

astrokin

import UIKit

/// A validation rule for text input.
public enum TextValidationRule {
    /// Any input is valid, including an empty string.
    case noRestriction
    /// The input must not be empty.
    case nonEmpty
    /// The enitre input must match a regular expression. A matching substring is not enough.
    case regularExpression(NSRegularExpression)

astrokin

//
//  Activity.swift
//
//  Created by Zachary Waldowski on 8/21/16.
//  Copyright © 2016 Zachary Waldowski. Licensed under MIT.
//

import os.activity

private final class LegacyActivityContext {

astrokin

import UIKit

class AZTextFrameAttributes: NSObject {
  
  // MARK: - Properties
  
  fileprivate(set) var width: CGFloat = 0
  fileprivate(set) var string: String?
  fileprivate(set) var attributedString: NSAttributedString?
  

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private let timerQueue = DispatchQueue(label: "com.timer.queue", attributes: [])

final class Timer : NSObject {
    
    private var timer: DispatchSourceTimer?
    var active: Bool {
        return timer != nil
    }
    
    func start(_ interval: Int, repeats: Bool = false, handler: @escaping () -> Void) {

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enum Result<T, E> {
    
    case value(T)
    case error(E)
    
    var value: T? {
        switch self {
        case .value(let value):
            return value
        case .error:

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public func with<T>(_ item: inout T, action: (inout T) -> Void) {
    action(&item)
}

public func with<T>(_ item: T, action: (T) -> Void) {
    action(item)
}

public func with<T: AnyObject>(_ item: T, action: (T) -> Void) {
    action(item)

astrokin

// https://github.com/avito-tech
//
// Sampler is like a baby of Debouncer and Throttler.
//
// Unlike Debouncer, sampler executes action immediately (if there are no actions before, for time > delay)
// Unlike Throttler it guarantees that last action in sequence will be executed (see last error in example)

/// CAUTION: This class isn't thread-safe
public final class Sampler {
    // MARK: - Public properite

astrokin

// https://github.com/avito-tech

private class ObserverBox<T>: Hashable {
    typealias Observer = T
    
    private(set) weak var disposable: AnyObject?
    private let objectIdentifier: ObjectIdentifier
    var observers = [Observer]()
    let hashValue: Int