yHomework

struct SearchView: View {
    @ObservedObject var viewModel: SearchViewModel

    var body: some View {
        VStack {
            TextField("Search", text: $viewModel.query)
            List(viewModel.songs) {
                Text($0.name)
            }
        }

yHomework

import UIKit


class ChatCollectionViewFlowLayout: UICollectionViewFlowLayout {
    
    private var topMostVisibleItem    =  Int.max
    private var bottomMostVisibleItem = -Int.max
    
    private var offset: CGFloat = 0.0
    private var visibleAttributes: [UICollectionViewLayoutAttributes]?

yHomework

// The MIT License (MIT)
//
// Copyright (c) 2017 Alexander Grebenyuk (github.com/kean).

import Foundation
import Alamofire
import RxSwift
import RxCocoa

yHomework

final class ViewController: UIViewController {

    @IBOutlet weak var bottomConstraint: NSLayoutConstraint!

    private let disposeBag = DisposeBag()

    override func viewDidLoad() {
        super.viewDidLoad()

        // avoid keyboard.

yHomework

import Foundation

/// An abstract class that makes building simple asynchronous operations easy.
/// Subclasses must implement `execute()` to perform any work and call
/// `finish()` when they are done. All `NSOperation` work will be handled
/// automatically.
open class AsynchronousOperation: Operation {

    // MARK: - Properties