rjchatfield

@resultBuilder
public struct ArrayBuilder<Element> {
    public static func buildPartialBlock(first: Element) -> [Element] { [first] }
    public static func buildPartialBlock(first: [Element]) -> [Element] { first }
    public static func buildPartialBlock(accumulated: [Element], next: Element) -> [Element] { accumulated + [next] }
    public static func buildPartialBlock(accumulated: [Element], next: [Element]) -> [Element] { accumulated + next }
    
    // Empty Case
    public static func buildBlock() -> [Element] { [] }
    // If/Else

marcpalmer

import Combine
import SwiftUI

struct SnapPointPreferenceData {
    let frame: Anchor<CGRect>
}

struct SnapPointPreferenceKey: PreferenceKey {
    typealias Value = SnapPointPreferenceData?
    

HiddenJester

Replacing the SceneDelegate When Running Unit Tests

Overview

I've been working through the exercises in the excellent iOS Unit Testing by Example book by Jon Reid, which I highly recommend. However, the book is in beta at the moment and there are some curveballs thrown by iOS 13 that aren't handled in the text yet. Specifically, when I hit the section about using a testing AppDelegate class I thought "This is very good. But what about the SceneDelegate?"

In Chapter 4 the recommendation is to remove the @UIApplicationMain decoration and make a manual top-level call to UIApplicationMain. To wit:

import UIKit

AliSoftware

/*:
 This is a concept re-implementation of the @Binding and @State property wrappers from SwiftUI

 The only purpose of this code is to implement those wrappers myself
   just to understand how they work internally and why they are needed,

 ⚠️ This is not supposed to be a reference implementation nor cover all
      subtleties of the real Binding and State types.
    The only purpose of this playground is to show how re-implementing
      them myself has helped me understand the whole thing better

ilessing

Using Pandoc to generate PDFs from Markdown

on a Mac running macOS 10.13.4

To install the needed components you can use Homebrew

Two Components are needed:

rbuckton

Cancellation Signals

• Introduction
• CancellationTokenSource
• CancellationToken
• Examples
• Reference Implementation

Introduction

karlvr

#!/bin/bash

# This script automatically sets the version and short version string of
# an Xcode project from the Git repository containing the project.
#
# To use this script in Xcode, add the script's path to a "Run Script" build
# phase for your application target.

set -o errexit
set -o nounset

rob-murray

#!/bin/bash

#
# Use agvtool to set Xcode project build number and create git tag
# Note: requires Xcode project configured to use Apple Generic Versioning and git
#
# Usage: set_agv_ver.sh 123
#
# src: https://gist.github.com/rob-murray/8644974
#

couchdeveloper

//
//  RXTimer.h
//
//  Copyright 2013 Andreas Grosam
//
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//
//  http://www.apache.org/licenses/LICENSE-2.0

couchdeveloper

//
//  RXAsynchronousOperation.h
//  
//  Copyright 2013 Andreas Grosam
//
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//
//  http://www.apache.org/licenses/LICENSE-2.0