andeeliao

extension Optional {
    var isNotNil: Bool {
        return self != nil
    }
}

andeeliao

//
//  MVVM.swift
//  ios-app
//
//  Created by xue qi liao on 9/28/23.
//

// FIXME: this entire protocol stack needs to be related, as in ONE set of MVVM should be
// related and we shouldn't be passing unrelated Models to unrelated ViewModels or Views
// but that is beyond the scope of MVP

andeeliao

extension UIView {
    var image: UIImage {
        let renderer = UIGraphicsImageRenderer(bounds: bounds)
        return renderer.image { rendererContext in
            layer.render(in: rendererContext.cgContext)
        }
    }
}
extension UIButton {
    func setBackgroundView(_ view: UIView, for state: UIControl.State) {

andeeliao

extension ComparisonResult {
    func reversed() -> ComparisonResult {
        switch self {
        case .orderedAscending:
            return .orderedDescending
        case .orderedDescending:
            return .orderedAscending
        case .orderedSame:
            return .orderedSame
        }