stinger

extension NSObjectProtocol where Self: NSObject {
	func observe<Value>(_ keyPath: KeyPath<Self, Value>, onChange: @escaping (Value) -> ()) -> NSKeyValueObservation {
		return observe(keyPath, options: [.initial, .new]) { _, change in
			// TODO: change.newValue should never be `nil`, but when observing an optional property that's set to `nil`, then change.newValue is `nil` instead of `Optional(nil)`. This is the bug report for this: https://bugs.swift.org/browse/SR-6066
			guard let newValue = change.newValue else { return }
			onChange(newValue)
		}
	}

	func bind<Value, Target>(_ sourceKeyPath: KeyPath<Self, Value>, to target: Target, at targetKeyPath: ReferenceWritableKeyPath<Target, Value>) -> NSKeyValueObservation {

stinger

@dynamicMemberLookup
class Person {
  let name: String
  let age: Int
  private let details: [String: String]
  
  init(name: String, age: Int, details: [String: String]) {
    self.name = name
    self.age = age
    self.details = details

stinger

import Foundation

extension Date {
    typealias FormattedString = (DateFormatter) -> String

    func formatted(by format: String) -> FormattedString {
        return { formatter in
            formatter.dateFormat = format
            return formatter.string(from: self)
        }

stinger

import UIKit

extension UIImage {
  /**
   Resizes the image to width x height and converts it to an RGB CVPixelBuffer.
  */
  public func pixelBuffer(width: Int, height: Int) -> CVPixelBuffer? {
    var maybePixelBuffer: CVPixelBuffer?
    let attrs = [kCVPixelBufferCGImageCompatibilityKey: kCFBooleanTrue,
                 kCVPixelBufferCGBitmapContextCompatibilityKey: kCFBooleanTrue]

stinger

extension View {
    func iff(_ condition: Bool, _ modifier: (Self) -> AnyView) -> AnyView {
        if condition {
            return modifier(self).eraseToAnyView()
        }
        return eraseToAnyView()
    }
    
    func some<Value>(_ optional: Value?, modifier: (Value, Self) -> AnyView) -> some View {
        guard let value = optional else {

stinger

import Foundation
import Combine

enum APIError: Error, LocalizedError {
    case unknown, apiError(reason: String)

    var errorDescription: String? {
        switch self {
        case .unknown:
            return "Unknown error"

stinger

import Foundation
import Combine

enum APIError: Error, LocalizedError {
    case unknown, apiError(reason: String), parserError(reason: String)

    var errorDescription: String? {
        switch self {
        case .unknown:
            return "Unknown error"

stinger

import Foundation
import Combine

enum APIError: Error, LocalizedError {
    case unknownError
    case unknownURL
    case unknownData
    case parserError(reason: String)
    case apiError(reason: String)

stinger

function prompt_char {
	if [ $UID -eq 0 ]; then echo "#"; else echo $; fi
}

PROMPT='%(!.%{$fg_bold[red]%}.%{$fg_bold[cyan]%}%n@)%m:%{$fg_bold[green]%}%(!.%~.%1~)%{$fg_bold[yellow]%} $(git_prompt_info)%{$fg_bold[cyan]%}$(prompt_char)%{$reset_color%} '

ZSH_THEME_GIT_PROMPT_PREFIX="("
ZSH_THEME_GIT_PROMPT_SUFFIX=") "

stinger

func validate<T: Codable>(_ validator: @escaping (T) -> Bool) -> (T) -> Bool {
  return { input in
    return validator(input)
  }
}

enum StringValidator: CustomStringConvertible {
    case isNotEmpty
    case lengthIn(ClosedRange<Int>)