Yuichi Fujiki yfujiki

## ViewModelTests.swift
class ViewModelTests: XCTestCase {

    var sut: ViewModel!
    var logger: MockLoggerProtocol!

    override func setUpWithError() throws {
    }

    override func tearDownWithError() throws {
    }

## CacheLabel.swift
    private var labelCache = [IndexPath: UILabel]()

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        ...
        if labelCache[indexPath] == nil {
            let label = UILabel()
            label.text = ...
            labelCache[indexPath] = label
        }

## CashbackLeaderboard.csv

          
            Rank
            Nick Name
            Last Cashback Date
            Total Cashback
            Boosted Cashback

            
              1
               QueenOfCashback
               23/02/2020
               1024SGD
               256SGD

            
              2
               Yu...LA6n4W
               04/02/2020
               666SGD
               222SGD

            
              3
               ChaChaCha
               03/02/2020
               444SGD
               111SGD

## UILabel-optimisation3.csv

          
              
             Base(MB)
             After(MB)
             Diff(MB)

            
              Simple Label
               6.34
               6.59
               0.25

            
              Simple Label with Nilify
               6.46
               6.48
               0.02

            
              Cached Simple Label
               6.57
               11.71
               5.14

            
              Attributed Label
               6.38
               6.53
               0.15

            
              Attributed Label with Nilify
               6.50
               6.61
               0.11

            
              Cached Attributed Label
               6.64
               12.07
               5.43

## UILabel-optimisation2.csv

          
              
             Base(MB)
             After(MB)
             Diff(MB)

            
              Simple Label
               6.34
               6.59
               0.25

            
              Simple Label with Nilify
               6.46
               6.48
               0.02

            
              Attributed Label
               6.38
               6.53
               0.15

            
              Attributed Label with Nilify
               6.50
               6.61
               0.11

## UILabel-optimisation1.csv

          
              
             Base(MB)
             After(MB)
             Diff(MB)

            
              Simple Label
               6.34
               6.59
               0.25

            
              Simple Label with Nilify
               6.46
               6.48
               0.02

            
              Cached Simple Label
               6.57
               11.71
               5.14

            
              Attributed Label
               6.38
               6.53
               0.15

            
              Attributed Label with Nilify
               6.50
               6.61
               0.11

            
              Cached Attributed Label
               6.64
               12.07
               5.43

            
              Image
               6.31
               6.59
               0.28

            
              Image with Nilify
               6.34
               6.55
               0.21

            
              Cached Image
               6.92
               14.82
               7.90

## ScratchCard-InspectImage.swift
extension UIView {

    func transparentPercentage() -> Double {
        let width = Int(bounds.width)
        let height = Int(bounds.height)

        // 1. Prepare a memory space where you write in RGBA data of the view
        var pixelData: [UInt8] = Array<UInt8>(repeating: 0, count: width * height * 4)
        let colorSpace = CGColorSpaceCreateDeviceRGB()
        let bitmapInfo = CGBitmapInfo(rawValue: CGImageAlphaInfo.premultipliedLast.rawValue)

## ScratchCard-DrawRect.swift
override func draw(_ rect: CGRect) {
    super.draw(rect)
}

override func draw(_ layer: CALayer, in context: CGContext) {
    super.draw(layer, in: context)

    // 1. Let the subviews to render into the context
    foregroundView?.layer.render(in: context)

## ScratchCard-TouchHandling.swift
private var previousLocation: CGPoint?
// 0. Line/LineCollection class is a convenience class to store line(s)
private var lineCollection: LineCollection = LineCollection()

override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
    // 1. If there is no touch point or if the point did not move, ignore
    guard let touch = touches.first else {
        return
    }
    let location = touch.location(in: self)

## CompositionalLayoutSample-CatsSection.swift
func setupCatsSection() -> NSCollectionLayoutSection {
    // 1. Configuring Section. Item -> Group -> Section
    // Item
    let item = NSCollectionLayoutItem(
        layoutSize: NSCollectionLayoutSize(widthDimension: .fractionalWidth(1.0),
                                           heightDimension: .fractionalHeight(1.0)))
    item.contentInsets = NSDirectionalEdgeInsets(top: 6.7, leading: 10.0, bottom: 6.7, trailing: 10.0)

    // Group
    let group = NSCollectionLayoutGroup.vertical(
	class ViewModelTests: XCTestCase {

	var sut: ViewModel!
	var logger: MockLoggerProtocol!

	override func setUpWithError() throws {
	}

	override func tearDownWithError() throws {
	}
	private var labelCache = [IndexPath: UILabel]()

	func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
	...
	if labelCache[indexPath] == nil {
	let label = UILabel()
	label.text = ...
	labelCache[indexPath] = label
	}
Rank	Nick Name	Last Cashback Date	Total Cashback	Boosted Cashback
1	QueenOfCashback	23/02/2020	1024SGD	256SGD
2	Yu...LA6n4W	04/02/2020	666SGD	222SGD
3	ChaChaCha	03/02/2020	444SGD	111SGD
	Base(MB)	After(MB)	Diff(MB)
Simple Label	6.34	6.59	0.25
Simple Label with Nilify	6.46	6.48	0.02
Cached Simple Label	6.57	11.71	5.14
Attributed Label	6.38	6.53	0.15
Attributed Label with Nilify	6.50	6.61	0.11
Cached Attributed Label	6.64	12.07	5.43
	extension UIView {

	func transparentPercentage() -> Double {
	let width = Int(bounds.width)
	let height = Int(bounds.height)

	// 1. Prepare a memory space where you write in RGBA data of the view
	var pixelData: [UInt8] = Array<UInt8>(repeating: 0, count: width * height * 4)
	let colorSpace = CGColorSpaceCreateDeviceRGB()
	let bitmapInfo = CGBitmapInfo(rawValue: CGImageAlphaInfo.premultipliedLast.rawValue)
	override func draw(_ rect: CGRect) {
	super.draw(rect)
	}

	override func draw(_ layer: CALayer, in context: CGContext) {
	super.draw(layer, in: context)

	// 1. Let the subviews to render into the context
	foregroundView?.layer.render(in: context)
	private var previousLocation: CGPoint?
	// 0. Line/LineCollection class is a convenience class to store line(s)
	private var lineCollection: LineCollection = LineCollection()

	override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
	// 1. If there is no touch point or if the point did not move, ignore
	guard let touch = touches.first else {
	return
	}
	let location = touch.location(in: self)
	func setupCatsSection() -> NSCollectionLayoutSection {
	// 1. Configuring Section. Item -> Group -> Section
	// Item
	let item = NSCollectionLayoutItem(
	layoutSize: NSCollectionLayoutSize(widthDimension: .fractionalWidth(1.0),
	heightDimension: .fractionalHeight(1.0)))
	item.contentInsets = NSDirectionalEdgeInsets(top: 6.7, leading: 10.0, bottom: 6.7, trailing: 10.0)

	// Group
	let group = NSCollectionLayoutGroup.vertical(