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extension View {
    // https://www.avanderlee.com/swiftui/conditional-view-modifier/
    /// Applies the given transform if the given condition evaluates to `true`.
    /// - Parameters:
    ///   - condition: The condition to evaluate.
    ///   - transform: The transform to apply to the source `View`.
    /// - Returns: Either the original `View` or the modified `View` if the condition is `true`.
    @ViewBuilder func `if`<Content: View>(_ condition: Bool, transform: (Self) -> Content) -> some View {
        if condition {
            transform(self)

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//
//  SwiftUICollectionView.swift
//  Sentry
//
//  Created by Simon Westerlund on 2019-12-29.
//  Copyright © 2019 Simon Westerlund. All rights reserved.
//

import SwiftUI

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let json = """
{
    "foo": "bar",
    "baz": null
}
"""

struct Type: Decodable {
    let type: String
    let value: String?

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struct FontSizesHelper {
    static func dynamicSize(for originalSize: CGFloat, category: UIContentSizeCategory = UIApplication.shared.preferredContentSizeCategory) -> CGFloat {
        let modifyBy: CGFloat = {
            switch category {
                case .extraSmall: return -3
                case .small: return -2
                case .medium: return -1
                case .large: return 0
                case .extraLarge: return 2
                case .extraExtraLarge: return 4

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Analysis of Apple’s rubber band scrolling

January 6, 2013

I recently saw a post on Twitter from @chpwn that described the alogorithm that Apple uses for its “rubber band” or “bungee” scrolling.

b = (1.0 – (1.0 / ((x * c / d) + 1.0))) * d

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func orThrow<E: Error>(_ errorClosure: @autoclosure () -> E) throws -> Wrapped {
      guard let value = self else {
          throw errorClosure()
      }

      return value
}

// usage
orThrow(UnboxError.invalidData)

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// based on this answer 'http://stackoverflow.com/a/36016798'
class LeftAlignedCollectionViewFlowLayout: UICollectionViewFlowLayout {

    override func layoutAttributesForElements(in rect: CGRect) -> [UICollectionViewLayoutAttributes]? {
        let attributes = super.layoutAttributesForElements(in: rect)

        var leftMargin = sectionInset.left
        var maxY: CGFloat = -1.0
        attributes?.forEach { layoutAttribute in
            if layoutAttribute.frame.origin.y >= maxY {

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//  A boiler plate operation to be used as a subclass
//
//  Created by Simon Westerlund on 2016-11-07.
//  Copyright © 2016 Simon Westerlund. All rights reserved.
//
import Foundation

final class BaseOperation: Operation {
    private var _isFinished = false {
        willSet { willChangeValue(forKey: "isFinished") }

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//  A boiler plate operation to be used as a subclass
//
//  Created by Simon Westerlund on 2016-11-07.
//  Copyright © 2016 Simon Westerlund. All rights reserved.
//
import Foundation

final class BaseOperation: Operation {
    private var _isFinished = false {
        willSet { willChangeValue(forKey: "isFinished") }

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extension String {
    func pirated() -> String {
        let consonants = "bcdfghjklmnpqrstvwxyz"

        return characters.map({ char -> String in
            let character = String(char)
            if consonants.contains(character.lowercased()) {
                return "\(char)o\(character.lowercased())"
            }
            return character