ericclemmons

Using <details> in GitHub

Suppose you're opening an issue and there's a lot noisey logs that may be useful.

Rather than wrecking readability, wrap it in a <details> tag!

<details>
 Summary Goes Here

KhaosT

Displaying HDMI sources on Apple Vision Pro

While it's possible to stream most content to Apple Vision Pro directly over the internet, having the ability to use Apple Vision Pro as an HDMI display can still be useful.

Since Apple Vision Pro does not support connecting to an HDMI input directly or using an HDMI capture card, we have to be a little creative to make this work. NDI provides the ability to stream HDMI content over a local network with really low latency, and it works great with Apple Vision Pro.

This page shows the setup I’m using.

brettohland

FormatStyle in Excruciating Detail

A collection of all of the various options and styles available to you if you'd like to format data into string on iOS 15.

See every option in detail at fuckingformatstyle.com or goshdarnformatstyle.com.

Download the Xcode Playground:

https://github.com/brettohland/FormatStylesDeepDive

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

import SwiftUI

extension CGPoint {
    static func *(lhs: Self, rhs: CGFloat) -> Self {
        .init(x: lhs.x * rhs, y: lhs.y * rhs)
    }
}

// Idea: https://www.framer.com/showcase/project/lo2Qka8jtPXrjzZaPZdB/

textarcana

#!/usr/bin/env bash

# Use this one-liner to produce a JSON literal from the Git log:

git log \
    --pretty=format:'{%n  "commit": "%H",%n  "author": "%aN <%aE>",%n  "date": "%ad",%n  "message": "%f"%n},' \
    $@ | \
    perl -pe 'BEGIN{print "["}; END{print "]\n"}' | \
    perl -pe 's/},]/}]/'

ollieatkinson

import Darwin
import Foundation
import UIKit

// https://github.com/xybp888/iOS-SDKs/blob/master/iPhoneOS17.1.sdk/System/Library/PrivateFrameworks/CoreSVG.framework/CoreSVG.tbd
// https://developer.limneos.net/index.php?ios=17.1&framework=UIKitCore.framework&header=UIImage.h

@objc
class CGSVGDocument: NSObject { }

IanKeen

import SwiftUI

extension View {
    public func discover<T: UIView>(
        tag: Int = .random(in: (.min)...(.max)),
        where predicate: @escaping (T) -> Bool = { _ in true },
        _ closure: @escaping (T) -> Void
    ) -> some View {
        self.overlay(
            DiscoveryView(tag: tag)

IanKeen

struct User: Equatable {
    var firstName: String
    var lastName: String
}

@main
struct MyApp: App {
    @State var value = User(firstName: "", lastName: "")
    @State var showEdit = false

IanKeen

import Foundation

public protocol CodingStrategy {
    associatedtype Converted
    associatedtype RawValue: Codable

    static func toRaw(_ value: Converted) throws -> RawValue
    static func toValue(_ raw: RawValue) throws -> Converted
}