seanwoodward

extension Collection {
  func random(pick: Int) -> [Element] {
    return self.indices.shuffled().prefix(pick).map { self[$0] }
  }
}

seanwoodward

extension Array {
  /// Chunk an array in to an array of arrays of the provided size (or smaller)
  /// - Parameters:
  ///   - size: the size of the chunk
  /// - Returns: An array of arrays of `Element`
  func chunked(into size: Int) -> [[Element]] {
    return Swift.stride(from: 0, to: self.count, by: size).map {
      Array(self[$0 ..< Swift.min($0 + size, self.count)])
    }
  }

seanwoodward

import Foundation
import zlib

extension Array where Element == UInt8 {
  func adler32() -> UInt32 {
    let a1 = zlib.adler32(0, nil, 0)
    
    let size = self.count
    
    let result = self.withUnsafeBytes { (p1: UnsafeRawBufferPointer) -> UInt32 in

seanwoodward

import CoreData

@objc(_PersistentStoreDescription) private protocol AnyPersistentStoreDescription: NSObjectProtocol, NSCopying {

    var type: String { get set }
    var configuration: String? { get set }
    @objc(URL) var url: URL? { get set }

    var options: [String : NSObject] { get }
    func setOption(_ option: NSObject?, forKey key: String)

seanwoodward

func executeFetchRequestT<T:AnyObject>(request:NSFetchRequest, managedObjectContext:NSManagedObjectContext, error: NSErrorPointer = nil) -> [T]? {
    var localError: NSError? = nil

    if let results:[AnyObject] = managedObjectContext.executeFetchRequest(request, error: &localError) {
        if results.count > 0 {
            if results[0] is T {
                let asT:[T] = results as [T]
                return .Some(asT)
            }

seanwoodward

@interface ViewController

@property (nonatomic, weak) IBOutlet UILabel *numberLabel;
@property (nonatomic, strong) NSTimer *numberTimer;
@property (nonatomic, assign) double value;
@property (nonatomic, assign) BOOL cancelTimer;
@property (nonatomic, assign) NSTimeInterval timeInterval;

- (void)updateNumberLabel;
- (void)stopTimer;