NachoSoto

// Extensions to simplify usage of accessibilityTraits in Swift 4.2:

public func |= (traits: inout UIAccessibilityTraits, other: [UIAccessibilityTraits]) {
    for o in other {
        traits |= o
    }
}

public func |= (traits: inout UIAccessibilityTraits, other: UIAccessibilityTraits) {
    // From: https://swift.org/migration-guide-swift4.2/#known-migration-issues

NachoSoto

import Foundation

extension Sequence {
    // Extension on Sequence allows us to use this method on Arrays, Maps, Sets, etc.
    func uniqueElements<Index: Hashable>(for indexer: (Element) -> Index) -> [Element] {
        // Keep track of what we've already seen in a Set,
        // which allows us to query for elements efficiently.
        var seenElements: Set<Index> = []
        
        var result: [Element] = []

NachoSoto

import UIKit
import Cartography // https://github.com/robb/Cartography

/**
 This is an example of self sizing `UICollectionView` cells using AutoLayout,
 where the width of cells is always the width of the parent, to mimic `UITableView`.
 */

fileprivate let items: [String] = (0..<100)
    .map { _ in Lorem.sentences(Int.random(min: 1, max: 8)) } // Using https://github.com/lukaskubanek/LoremSwiftum/blob/master/Sources/LoremSwiftum.swift

NachoSoto

Test Suite 'All tests' started at 2017-03-28 11:27:46.053
Test Suite 'Quick.framework' started at 2017-03-28 11:27:46.055
Test Suite 'Quick.framework' passed at 2017-03-28 11:27:46.055.
	 Executed 0 tests, with 0 failures (0 unexpected) in 0.000 (0.001) seconds
Test Suite 'APITests.xctest' started at 2017-03-28 11:27:46.056
Test Suite 'WebURLParserSpec' started at 2017-03-28 11:27:46.057
Test Case '-[APITests.WebURLParserSpec Card_graph_URLs__parses_url_with_all_data]' started.
=================================================================
==32504==ERROR: AddressSanitizer: heap-use-after-free on address 0x60600028a8b0 at pc 0x0001207f1970 bp 0x7fff529ebf30 sp 0x7fff529ebf28
WRITE of size 8 at 0x60600028a8b0 thread T0

NachoSoto

// https://twitter.com/davedelong/status/701621040015810560: @NachoSoto is there a way to take a # of SignalProducer<U,E> and turn them in to SignalProducer<[U], E>? Like combineLatest but w/o tuples

let signals: [SignalProducer<T, E>]

let result: SignalProducer<[T], E> = 
  SignalProducer(values: signals) // create a producer that emits all signals.
    .flatten(.Merge)              // merge all values that they emit.
    .collect()                    // collect all values into an array.

NachoSoto

//
//  Signal+Extensions.swift
//  Khan Academy
//
//  Created by Nacho Soto on 10/1/15.
//  Copyright © 2015 Khan Academy. All rights reserved.
//

import ReactiveCocoa

NachoSoto

protocol ValidatorType {
    typealias ValidatedType
    func isValid(object: ValidatedType) -> Bool
}

// You might want to make it a reference type, depending on your case.
struct AnyValidator<T>: ValidatorType {
    private let validatorBlock: (T) -> Bool
    
    init<V: ValidatorType where V.ValidatedType == T>(validator: V) {

NachoSoto

# Using https://github.com/Anviking/Decodable as example:

xcodebuild -sdk appletvsimulator -project Decodable.xcodeproj -configuration Release -scheme Decodable-tvOS ONLY_ACTIVE_ARCH=NO clean build

# This fails with http://www.openradar.me/22993940

NachoSoto

var testArray: [Int] = []

func modify(action: [Int] -> [Int]) {
    testArray = action(testArray)
}

for _ in 0..<50 {
    modify { array in
        var array = array
        

NachoSoto

func f(a: Bool, b: Bool) {
	switch (a, b) {
		case (false, false):
			break
		case (false, true):
			break
		case (true, false):
			break
		case (true, true):
			break