laevandus

let text = "The quick <color_1> <animal_1> jumps over the lazy <animal_2>"
let replacementMap = ["<animal_1>": "fox", "<animal_2>": "dog", "<color_1>": "brown"]

extension String {
    func replacingOccurrences(matchingPattern pattern: String, replacementProvider: (String) -> String?) -> String {
        let expression = try! NSRegularExpression(pattern: pattern, options: [])
        let matches = expression.matches(in: self, options: [], range: NSRange(startIndex..<endIndex, in: self))
        return matches.reversed().reduce(into: self) { (current, result) in
            let range = Range(result.range, in: current)!
            let token = String(current[range])

laevandus

import UIKit

/*
 Contrast ratio is calculated using the proceedure here:
 https://www.w3.org/TR/WCAG20-TECHS/G17.html#G17-procedure
 */

public extension UIColor {
    /// Relative luminance of the color.
    var relativeLuminance: CGFloat {

laevandus

// This API is available in iOS 16, macOS 13.0, tvOS 16.0, watchOS 9.0.
// Using backDeployed we can make it available in old OSes, like iOS 15 etc
extension Font {
  @backDeployed(before: iOS 16.0, macOS 13.0, tvOS 16.0, watchOS 9.0)
  @available(iOS 15.0, macOS 12.0, tvOS 15.0, watchOS 8.0, *)
  public static func system(size: CGFloat, weight: Font.Weight? = nil, design: Font.Design? = nil) -> Font {
    fatalError("Implement")
  }
}

laevandus

struct Circle {
  let centre: CGPoint
  let radius: Double
}
extension Circle {
  init(diameter: Double) {
    centre = .zero
    radius = diameter / 2
  }
}

laevandus

extension RangeReplaceableCollection where Element: Equatable {
  @discardableResult mutating func remove(_ element: Element) -> Bool {
    guard let index = self.firstIndex(of: element) else { return false }
    remove(at: index)
    // Remove other duplicate elements by recursivly calling it again
    remove(element)
    return true
  }
}

laevandus

struct SubtitledButton: View {
  let title: LocalizedStringKey
  let subtitle: LocalizedStringKey
  let action: () -> Void
  var body: some View {
    Button(action: action, label: {
      VStack(spacing: 4) {
        Text(title)
        Text(subtitle)
          .font(.footnote)

laevandus

import Foundation
import CommonCrypto

extension Data {
    enum Algorithm {
        case md5
        case sha1
        case sha224
        case sha256
        case sha384

laevandus

let first = ["a": 1, "b": 2]
let second = ["a": 9, "c": 3]

// value in `first` wins if the same key in both
let merged1 = first.merging(second, uniquingKeysWith: { current, _ in current })
// value in `second` wins if the same key in both
let merged2 = first.merging(second, uniquingKeysWith: { _, new in new })

extension Dictionary {
    func mergingUniqueKeys(from other: [Key: Value]) -> [Key: Value] {

laevandus

override func tableView(_ tableView: UITableView, trailingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
    let item = content[indexPath.item]
    switch item {
    case .iconAction:
        let action = UIContextualAction(style: .normal, title: item.rawValue, handler: { [weak self] (action, view, block) in
            self?.showAlert(item.rawValue)
        })
        action.backgroundColor = UIColor(hue: 0.11, saturation: 0.56, brightness: 0.48, alpha: 1.0)
        action.image = UIImage(named: "Icon")
        return UISwipeActionsConfiguration(actions: [action])

laevandus

import UIKit

final class FittingHeightCollectionViewController: UICollectionViewController {
    private let items: [[String]]
    
    init(items: [[String]]) {
        self.items = items
        let layout = UICollectionViewFlowLayout()
        layout.estimatedItemSize = UICollectionViewFlowLayout.automaticSize
        layout.itemSize = UICollectionViewFlowLayout.automaticSize