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Bas Broek BasThomas

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View temperature.swift
extension Locale {
var defaultTemperatureUnit: UnitTemperature {
if #available(iOS 16, *) {
return UnitTemperature(forLocale: self, usage: .general)
} else {
let mCel = Measurement(value: 0, unit: UnitTemperature.celsius)
let f = MeasurementFormatter()
f.locale = self
let s1 = f.string(from: mCel)
BasThomas / moving-average.swift
Last active December 30, 2022 18:26
Calculate a moving average in Swift (Swift 4.1)
View moving-average.swift
extension Collection where Element == Int, Index == Int {
/// Calculates a moving average.
/// - Parameter period: the period to calculate averages for.
/// - Warning: the supplied `period` must be larger than 1.
/// - Warning: the supplied `period` should not exceed the collection's `count`.
/// - Returns: a dictionary of indexes and averages.
func movingAverage(period: Int) -> [Int: Float] {
precondition(period > 1)
precondition(count > period)
View traits.swift
import UIKit
protocol Component: NSObjectProtocol {
var accessibilityTraits: UIAccessibilityTraits { get set }
public final class SpecialComponent: UIView, Component {}
let mySpecialComponent: Component = SpecialComponent(frame: .zero)
mySpecialComponent.accessibilityTraits = .staticText
View throw-no-throw.swift
import Foundation
import XCTest
struct WompWomp: Error {
func myThrowingFunction() throws -> Int {
throw WompWomp()
View CellRegistration.swift
let registration = UICollectionView.CellRegistration<CardCollectionViewCell, Card> { cell, indexPath, card in
cell.card = card
let dataSource = UICollectionViewDiffableDataSource<Column, Card>(
collectionView: collectionView
) { collectionView, indexPath, card -> UICollectionViewCell in
using: registration,
for: indexPath,
item: card
View memberwise-nil.swift
struct Let {
let x: String?
struct Var {
var x: String?
let l1 = Let(x: nil)
// let l2 = Let() // not available
View protocol.swift
protocol MyProtocol {
func doThe(thing: String)
extension MyProtocol {
func doThe(thing: String = "") {
View UIAccessibility.h
Returns the localized label(s) that should be provided by the user to refer to this element.
Use this property when the accessibilityLabel is not appropriate for dictated or typed input.
For example, an element that contains additional descriptive information in its accessibilityLabel can return a more concise label.
The primary label should be first in the array, optionally followed by alternative labels in descending order of importance.
If this property returns an empty or invalid value, the accessibilityLabel will be used instead.
default == an empty array
default on UIKit controls == an array with an appropriate label, if different from accessibilityLabel
@available(iOS 13.0, *)
View messages.swift
import Foundation
struct Messages: Decodable {
let count: String
let messages: [Message]
enum CodingKeys: String, CodingKey {
case count = "message-count"
case messages
View vector.swift
struct Vector<T> {
let size: Int
let initialValue: T
struct Position: Equatable {
let row: Int
let column: Int
typealias Matrix = [Position]