manmal

// This is a variation on @merowing_'s Versionable: https://github.com/krzysztofzablocki/Versionable
// It's an attempt to add enumerated versions. Together with CaseIterable conformance, this makes 
// it harder to "forget" to add migrations for version bumps. Not super happy with the namings, but it
// should be enough to get the idea.
// 
// Modifications made:
// - New protocol `VersionType`
// - Versionable.Version is `VersionType`
// - Replaced Versionable.migrations with Versionable.migrate(to:)
// - decode() fetches migrations via Versionable.Version.allCases and Versionable.migrate(to:)

manmal

import Foundation
import PlaygroundSupport
import UIKit

class M {

    var a = ""

    func x() { self.a = "A" }

manmal

diskutil secureErase freespace 0 /dev/disk1s1

manmal

extension Date {

    var timeAgo: String {
        let calendar = Calendar.current
        let now = Date()
        let earliest = self < now ? self : now
        let latest =  self > now ? self : now

        let unitFlags: Set<Calendar.Component> = [.minute, .hour, .day, .weekOfMonth, .month, .year, .second]
        let components: DateComponents = calendar.dateComponents(unitFlags, from: earliest, to: latest)

manmal

import Foundation
import UIKit

class CachedItemHeightDatasource: NSObject, UITableViewDelegate, UITableViewDataSource {
    
    var heightAtIndexPath: [IndexPath: CGFloat] = [:]
    let tableView: UITableView
    
    func tableView(_ tableView: UITableView, estimatedHeightForRowAt indexPath: IndexPath) -> CGFloat {
        return heightAtIndexPath[indexPath] ?? UITableViewAutomaticDimension

manmal

import Foundation

/// Thread-safe value wrapper with asynchronous setter and
/// synchronous getter.
///
/// Some discussion: https://twitter.com/manuelmaly/status/1077885584939630593?s=20
public final class SynchronizedProperty<T> {
    public typealias DidSet = Bool
    
    public let executer: SynchronizedExecuter

manmal

public protocol TableViewCellDequeueIdentifier: CustomStringConvertible { }

public enum TableViewCellProducer<UITVC: UITableViewCell>: Equatable {
    
    case classAndIdentifier(class: UITVC.Type, identifier: TableViewCellDequeueIdentifier, configure: (UITVC) -> ())
    case generator(() -> UITVC)
    
    func cell(tableView: UITableView) -> UITVC {
        switch self {
        case let .classAndIdentifier(clazz, identifier, configure):

manmal

import Foundation
import UIKit

// Uses locking from https://gist.github.com/einsteinx2/00b9ebd962f3a0f6c9e758f842e4c6f9
class HTMLAttributedStringCache {
    
    private let lock = NSLock()
    
    private struct Key: Hashable {
        

manmal

// mark - CDEPersistentStoreEnsembleDelegate

public func persistentStoreEnsemble(_ ensemble: CDEPersistentStoreEnsemble, didSaveMergeChangesWith notification: Notification) {
    
    func mergeChanges(stack: DataStack) {
        
        assert(Thread.isMainThread)
        
        let mainContext = stack.internalContext()
        

manmal

import Foundation

extension Array where Element:Equatable {
    typealias ArrayDiffResult = (added: [(Index, Element)], removed: [(Index, Element)], changed: [(Index, Element)])

    // Inspired by: http://stackoverflow.com/q/3476672/458603
    // compare has to return .orderedSame if the identity of the element is the same,
    // even if the element's values have changed.
    func diff(other: Array<Element>, compare: ((Element, Element) -> ComparisonResult), preSorted: Bool) -> ArrayDiffResult {