katleta3000

1. Очень крутая книжка по сетям (стек OSI) – Charles Severance “Introduction to Network: How the Internet works”
2. URLCache – https://nshipster.com/nsurlcache/
3. Ресёрч HTTP-кеширования с использованием URLCache https://qnoid.com/2016/04/10/A-primer-in-HTTP-caching-and-its-native-support-by-iOS.html
4. Анализ доступности сети:
   * SimplePing – https://developer.apple.com/library/archive/samplecode/SimplePing/Introduction/Intro.html
   * https://github.com/dustturtle/RealReachability
   * https://github.com/ankitthakur/SwiftPing
   * https://github.com/lmirosevic/GBPing
   * https://github.com/rwbutler/Connectivity
   * Баг с 2009 года – https://lists.apple.com/archives/macnetworkprog/2009/May/msg00056.html

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

danielctull

extension UICollectionViewFlowLayout {

    typealias DelegateMethod<Key, Value> = ((UICollectionView, UICollectionViewLayout, Key) -> Value)

    private var delegate: UICollectionViewDelegateFlowLayout? {
        return collectionView?.delegate as? UICollectionViewDelegateFlowLayout
    }

    func retrieve<Key, Value>(

wojteklu

Code is clean if it can be understood easily – by everyone on the team. Clean code can be read and enhanced by a developer other than its original author. With understandability comes readability, changeability, extensibility and maintainability.

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General rules

1. Follow standard conventions.
2. Keep it simple stupid. Simpler is always better. Reduce complexity as much as possible.
3. Boy scout rule. Leave the campground cleaner than you found it.
4. Always find root cause. Always look for the root cause of a problem.

Design rules

andymatuschak

A composable pattern for pure state machines with effects

State machines are everywhere in interactive systems, but they're rarely defined clearly and explicitly. Given some big blob of code including implicit state machines, which transitions are possible and under what conditions? What effects take place on what transitions?

There are existing design patterns for state machines, but all the patterns I've seen complect side effects with the structure of the state machine itself. Instances of these patterns are difficult to test without mocking, and they end up with more dependencies. Worse, the classic patterns compose poorly: hierarchical state machines are typically not straightforward extensions. The functional programming world has solutions, but they don't transpose neatly enough to be broadly usable in mainstream languages.

Here I present a composable pattern for pure state machiness with effects,

luca-bernardi

protocol Reusable{
    static var reuseIdentifier: String { get }
}

extension Reusable {
    static var reuseIdentifier: String { return String(Self.self) }
}

extension UICollectionViewCell : Reusable {}

fabb

import UIKit

extension UIImage {
	
	// colorize image with given tint color
	// this is similar to Photoshop's "Color" layer blend mode
	// this is perfect for non-greyscale source images, and images that have both highlights and shadows that should be preserved
	// white will stay white and black will stay black as the lightness of the image is preserved
	func tint(tintColor: UIColor) -> UIImage {
		

alanzeino

LLDB Debugging Cheat Sheet

Commands

LLDB Commands

LLDB comes with a great set of commands for powerful debugging.

help

Your starting point for anything. Type help to get a list of all commands, plus any user installed ones. Type 'help for more information on a command. Type help to get help for a specific option in a command too.

jkereako

iOS developer reading list

The best way to learn and master iOS development is to read the official documentation. It can be boring but you can trust its accuracy and the information will be presented without opinion.

Read documents in order where indicated.

Topics

• Preliminary guides
• Objective-C

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

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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.

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