eMdOS

import UIKit

public class ScrollableStackView: UIView {

    // MARK: Properties

    private var didSetupConstraints = false

    private lazy var scrollView: UIScrollView = {
        let scrollView = UIScrollView(frame: .zero)

eMdOS

Extension:

extension URL: ExpressibleByStringLiteral {
    public init(stringLiteral value: StaticString) {
        guard let url = URL(string: "\(value)") else {
            fatalError("Invalid URL string literal: \(value)")
        }
        self = url
 }

eMdOS

protocol NibLoadableView: class {
    static var nibName: String { get }
}

extension NibLoadableView where Self: UIView {
    static var nibName: String {
        return String(describing: self)
    }
}

eMdOS

How to use a .xcconfig file and a .plist file with SPM

Worth a read for some more context.

Create a Package.xcconfig file

Create the file in the root of the project (where your Package.swift file lives as well), and use the following contents:

/// Package.xcconfig

eMdOS

let elements: [String] = ["A", "B", "C", "D", "E", "F", "G", "H", "I"]

let chunk_1 = elements[...2].joined()
let chunk_2 = elements[3...5].joined()
let chunk_3 = elements[6...].joined()

concat(elements) == chunk_1 <> chunk_2 <> chunk_3
concat(elements) == concat([chunk_1, chunk_2, chunk_3])

eMdOS

concat(["A", "B", "C"]) == [String](arrayLiteral: "A", "B", "C").reduce("", <>)

eMdOS

public func concat<M: Monoid>(_ elements: [M]) -> M {
    elements.reduce(.empty, <>)
}

eMdOS

extension String: Monoid {
    public static let empty: String = ""
}

extension Array: Monoid {
    public static var empty: Array { [] }
}

eMdOS

// left identity
[] + ["A"] // = ["A"]
// right identity
["A"] + [] // = ["A"]

eMdOS

// left identity
"" + "A" // = "A"
// right identity
"A" + "" // = "A"