staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

---

DavidNix

static void LogNSNotifications(CFNotificationCenterRef center,
                               void *observer,
                               CFStringRef name,
                               const void *object,
                               CFDictionaryRef userInfo);

void LogNSNotifications(CFNotificationCenterRef center,
                        void *observer,
                        CFStringRef name,
                        const void *object,

3lvis

print(String(data: try! JSONSerialization.data(withJSONObject: dict, options: .prettyPrinted), encoding: .utf8)!)

steipete

# The trick is to link the DeviceSupport folder from the beta to the stable version.
# sudo needed if you run the Mac App Store version. Always download the dmg instead... you'll thank me later :)

# Support iOS 15 devices (Xcode 13.0) with Xcode 12.5:
sudo ln -s /Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/15.0 /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport

# Then restart Xcode and reconnect your devices. You will need to do that for every beta of future iOS versions

# (A similar approach works for older versions too, just change the version number after DeviceSupport)

oleander

APP="MyApp"
CONSTRUCT=xcodebuild -workspace $(APP).xcworkspace -scheme $(APP) clean

install_deps:
	pod install
create_config:
	swift package fetch
	swift package generate-xcodeproj
wipe:
	rm -rf .build $(APP).xcodeproj $(APP).xcworkspace Package.pins Pods Podfile.lock

mbuchetics

enum JSON: Decodable {
    case bool(Bool)
    case double(Double)
    case string(String)
    indirect case array([JSON])
    indirect case dictionary([String: JSON])

    init(from decoder: Decoder) throws {
        if let container = try? decoder.container(keyedBy: JSONCodingKeys.self) {
            self = JSON(from: container)

lattner

Swift Concurrency Manifesto

Author: Chris Lattner

Chinese Translation by Jason Yu

Contents

• Introduction
• Overall Vision

MartinMoizard

/// Every view interacting with a `SayHelloViewModel` instance can conform to this.
protocol SayHelloViewModelBindable {
    var disposeBag: DisposeBag? { get }
    func bind(to viewModel: SayHelloViewModel)
}

/// TableViewCells
final class TextFieldCell: UITableViewCell, SayHelloViewModelBindable {
    @IBOutlet weak var nameTextField: UITextField!
    var disposeBag: DisposeBag?

tclementdev

libdispatch efficiency tips

The libdispatch is one of the most misused API due to the way it was presented to us when it was introduced and for many years after that, and due to the confusing documentation and API. This page is a compilation of important things to know if you're going to use this library. Many references are available at the end of this document pointing to comments from Apple's very own libdispatch maintainer (Pierre Habouzit).

My take-aways are:

• You should create very few, long-lived, well-defined queues. These queues should be seen as execution contexts in your program (gui, background work, ...) that benefit from executing in parallel. An important thing to note is that if these queues are all active at once, you will get as many threads running. In most apps, you probably do not need to create more than 3 or 4 queues.

• Go serial first, and as you find performance bottle necks, measure why, and if concurrency helps, apply with care, always validating under system pressure. Reuse

chriseidhof

//
//  ContentView.swift
//  DeleteMe
//
//  Created by Chris Eidhof on 02.02.21.
//

import SwiftUI

/*