dterekhov

import Foundation

enum Command: Codable {
  case load(key: String)
  case store(key: String, value: Int)
}

@main
struct Demo {
  static func main() throws {

dterekhov

import Foundation

// Helper async sequence emitting numbers 1...5
let numbers = [1, 2, 3, 4, 5].async

@main
struct Demo {
  static func main() async {
    print("map:", await numbers.map { $0 * 2 }.reduce([], +)) // [2, 4, 6, 8, 10]
    print("filter:", await numbers.filter { $0.isMultiple(of: 2) }.reduce([], +)) // [2, 4]

dterekhov

import SwiftUI

struct GradientBuilderView: View {
  @State private var gradientName = "New Gradient"
  @State private var stopCount = 7
  @State private var isEditing = false

  var body: some View {
    ScrollView {
      VStack(spacing: 20) {

dterekhov

Please check the attached images.

dterekhov

Console Debugging Tip for Swift Developers

Sometimes the debugger cannot display a value inside a property wrapper (e.g., @State, @Published, etc.).
You can directly access the underlying storage variable using the underscore (_) prefix in LLDB.

Example

(lldb) po self._viewModel.startPointAngle/*
 Console debugging tip for Swift developers

dterekhov

// MARK: - Swift 6: Typed throws

// Define a specific error type for integer parsing.
enum IntegerParseError: Error {
  case nonDigitCharacter(String, index: String.Index)
}

/// Parses a string into an integer, throwing a specific typed error if parsing fails.
///
/// - Parameter string: The string to parse.

dterekhov

import SwiftUI

// MARK: - 1. Basic fixed frame aligned to container
struct BasicsView: View {
  var body: some View {
    Color.red
      .frame(width: 200, height: 300)
      .containerRelativeFrame([.horizontal, .vertical], alignment: .topLeading)
  }
}

dterekhov

MeshGradient(
    width: 3,
    height: 3,
    points: [
        [0.0, 0.0], [0.5, 0.0], [1.0, 0.0],
        [0.0, 0.5], [0.9, 0.3], [1.0, 0.5],
        [0.0, 1.0], [0.5, 1.0], [1.0, 1.0]
    ],
    colors: [
        .black, .black, .black,

dterekhov

import SwiftUI

// MARK: - Safe environment access example
struct LibraryView: View {
    // Retrieves a non-optional environment value; throws if not set
    @Environment(Library.self) private var library

    var body: some View {
        // Your view content here
        Text("Library loaded: \(library.name)")

dterekhov

// Demonstrates that tuple type aliases with identical structures are considered equal by Swift.

typealias Person = (name: String, age: Int)
typealias Address = (street: String, houseNumber: Int)

let abbey = Person(name: "Abbey Road", age: 29)
let home = Address(street: "Abbey Road", houseNumber: 29)

if abbey == home {
  print("They are structurally equal!") // Works!