jamesujeon

import UIKit

extension UIView {
    func ancestorView<T: UIView>() -> T? {
        var view = superview
        while view != nil && !(view is T) {
            view = view?.superview
        }

        return view as? T

jamesujeon

import Foundation

extension Collection {
    subscript(safe index: Index) -> Element? {
        indices.contains(index) ? self[index] : nil
    }

    subscript(safe range: Range<Index>) -> SubSequence? {
        indices.contains(range.lowerBound) && indices.contains(range.upperBound) ? self[range] : nil
    }

jamesujeon

import Foundation

extension String {
    subscript(safe range: String.IndexDistance) -> Character? {
        guard let index = index(at: range) else { return nil }

        return self[index]
    }

    subscript(safe range: NSRange) -> Substring? {

jamesujeon

import Foundation

extension String {
    subscript(range: String.IndexDistance) -> Character {
        self[index(at: range)]
    }

    subscript(range: NSRange) -> Substring {
        self[range.lowerBound..<range.upperBound]
    }

jamesujeon

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>FILEHEADER</key>
<string>
//  ___FILENAME___
//  ___PROJECTNAME___
//
//  Copyright (c) ___YEAR___ ___ORGANIZATIONNAME___. All rights reserved.

jamesujeon

import UIKit

extension AppDelegate {
    func changeUserInterfaceStyle() {
        guard let window = window else { return }

        if window.overrideUserInterfaceStyle == .unspecified {
            window.overrideUserInterfaceStyle = UIScreen.main.traitCollection.userInterfaceStyle == .light ? .dark : .light
        } else {
            window.overrideUserInterfaceStyle = window.overrideUserInterfaceStyle == .light ? .dark : .light

jamesujeon

import Foundation

protocol Reusable {
    static var reuseIdentifier: String { get }
}

extension Reusable {
    static var reuseIdentifier: String {
        String(describing: self)
    }

jamesujeon

import Foundation
import Combine

protocol HasCancellables: AnyObject {
    var cancellables: Set<AnyCancellable> { get set }
}

extension HasCancellables {
    var cancellables: Set<AnyCancellable> {
        get {