rmirabelli

custom_rules:
  YYYY_considered_harmful: # rule identifier
    name: "YYYY considered harmful" # rule name. optional.
    regex: "(YYYY)" # matching pattern
    message: "YYYY means week-year; you probably want yyyy" # violation message. optional.
    severity: error # violation severity. optional.

rmirabelli

How Apple's app distribution works for iOS:

I'm an iOS architect at a good-sized agency with well over 100 iOS apps developed for our customers and released to the app store. We've got 4 hall of fame awards (none of which I directly worked on), and have a staff of 30 or so iOS developers in addition to other disciplines. I help lead the Dallas/Fort Worth iOS developer meet-up.

I only say these things so you understand that I've been working directly with these issues for a few years.

When a developer wants to put an app on an iOS device, that app needs to be _signed_ with a developer certificate. There are four general release categories of developer certificates: Developer, Ad-hoc, App Store, and Enterprise.

Developer certificates are to be used by the developer for debugging on a single device during application development. This isn't useful for much other than that single purpose. As I'm creating a new build every 5 minutes, Apple doesn't review these.

rmirabelli

# Turn off default SwiftLint rules
disabled_rules:
  - trailing_whitespace # Disables SwiftLint complaining about whitespace characters on empty lines
  - todo # Disables auto-warning of TODO statements

# Turn on extra SwiftLint rules
opt_in_rules:
  - array_init
  - attributes
  - closure_end_indentation

rmirabelli

# Warns for presence of unicode characters, due to possible RTL security
# issues, as a quick-and-dirty protection against https://trojansource.codes
# Exceptions are from usage in a test control group.
# This has been tested against a reasonable set of verifyable exploits.
#
# Yes, this is a huge hammer instead of a scalpel.
#
# Yes, this means no more emoji for variable names. You shouldn't have
# been doing that anyhow.
Unicode_considered_harmful:

rmirabelli

protocol DataFetcherDelegate {
    func fetchCompletedSuccessfully(_ things: [Thing]) -> Void
    func fetchCompletedUnsuccessfully(_ err:Error) -> Void
}

class Client {
    private let fetcher = DataFetcher()
    
    // ...

rmirabelli

func useAsynchronousFetch() -> Void {
    fetchData(value: 23) { result in
        switch result {
            case .success(let data):
                transformData(data) { result in
                    switch result {
                        case .success(let viewModel):
                            displayModel(viewModel)
                        case .failure(let error):
                            displayError(error)

rmirabelli

let sub = NotificationCenter.default
    .publisher(for: NSControl.textDidChangeNotification, object: filterField)
    .map( { ($0.object as! NSTextField).stringValue } )
    .filter( { $0.unicodeScalars.allSatisfy({CharacterSet.alphanumerics.contains($0)}) } )
    .debounce(for: .milliseconds(500), scheduler: RunLoop.main)
    .receive(on: RunLoop.main)
    .assign(to:\MyViewModel.filterString, on: myViewModel)

rmirabelli

import Foundation
import UIKit

enum PostError: Error {
    case badURL
    case badResponse
    case noData
    case decodingError
}

rmirabelli

import XCTest
@testable import AsyncAwaitModule

class AsyncAwaitModuleTests: XCTestCase {

    // note the complexity in this unit test
  
    func testClosure() throws {
        let expectation = expectation(description: "posts fetch")
        PostsService().fetchPosts { result in

rmirabelli

// Set the Date header to our Date as a UTC String.
const dateStr = new Date().toUTCString();
pm.request.headers.upsert({key:'Date', value: dateStr});

// Hash the request body using SHA256 and encode it as Base64
const hashedBodyStr = CryptoJS.SHA256(pm.request.body.raw).toString(CryptoJS.enc.Base64)
// And add that to the header x-ms-content-sha256
pm.request.headers.upsert({
    key:'x-ms-content-sha256',
    value: hashedBodyStr