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@kabiroberai
kabiroberai / MainActor+Perform.swift
Last active April 23, 2024 16:47
Run tasks synchronously on the Main Actor: https://forums.swift.org/t/async-await-is-it-possible-to-start-a-task-on-mainactor-synchronously/52862/23
import Foundation
extension MainActor {
/// Invoke `body`, running synchronously if possible.
///
/// This method is equivalent to `Task { @MainActor in <body> }`, except that
/// the first thread hop is elided if the caller is already on the main thread.
/// Thus if `<foo>` has no subsequent thread hops, it can run fully synchronously.
@discardableResult
public static func runAsap<Success>(
@staltz
staltz / introrx.md
Last active April 20, 2024 14:15
The introduction to Reactive Programming you've been missing
@IsaacXen
IsaacXen / README.md
Last active April 16, 2024 15:54
(Almost) Every WWDC videos download links for aria2c.
@tclementdev
tclementdev / libdispatch-efficiency-tips.md
Last active April 16, 2024 01:02
Making efficient use of the libdispatch (GCD)

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

@ollieatkinson
ollieatkinson / HTTPStatusCode.swift
Last active April 15, 2024 18:34
HTTP status codes as a Swift enum.
/// This is a list of Hypertext Transfer Protocol (HTTP) response status codes.
/// It includes codes from IETF internet standards, other IETF RFCs, other specifications, and some additional commonly used codes.
/// The first digit of the status code specifies one of five classes of response; an HTTP client must recognise these five classes at a minimum.
enum HTTPStatusCode: Int, Error {
/// The response class representation of status codes, these get grouped by their first digit.
enum ResponseType {
/// - informational: This class of status code indicates a provisional response, consisting only of the Status-Line and optional headers, and is terminated by an empty line.
case informational
@ddunbar
ddunbar / xcbuild-debugging-tricks.md
Last active April 13, 2024 15:41
Xcode new build system debugging tricks

New Build System Tricks

Command Line

alias xcbuild=$(xcode-select -p)/../SharedFrameworks/XCBuild.framework/Versions/A/Support/xcbuild
# THIS DOESNT WORK YET: xcbuild openIDEConsole  # … then switch to Xcode ➡️
xcbuild showSpecs
xcbuild build <foo.pif> [—target <target>]
@andymatuschak
andymatuschak / States-v3.md
Last active April 12, 2024 16:06
A composable pattern for pure state machines with effects (draft v3)

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,

@anhar
anhar / setting_up_ios_universal_links.md
Last active April 9, 2024 05:34
Setting up iOS Universal Links
@JaviLorbada
JaviLorbada / FRP iOS Learning resources.md
Last active April 8, 2024 18:07
The best FRP iOS resources.

Videos

@steipete
steipete / RandomColor.swift
Created April 6, 2021 17:20
Random Color for SwiftUI
extension Color {
/// Return a random color
static var random: Color {
return Color(
red: .random(in: 0...1),
green: .random(in: 0...1),
blue: .random(in: 0...1)
)
}
}