Marchuck

object PaginationItemCallback : DiffUtil.ItemCallback<Person?>() {

    override fun areItemsTheSame(oldItem: Person?, newItem: Person?): Boolean {
        if (oldItem == null || newItem == null) return false
        return oldItem == newItem
    }

    override fun areContentsTheSame(oldItem: Person?, newItem: Person?): Boolean {
        if (oldItem == null || newItem == null) return false
        return oldItem.name == newItem.name

Marchuck

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android">

    <data>

        <variable
            name="viewModel"
            type="pl.marchuck.pagingexample.pagination.PaginationViewModel" />
    </data>

Marchuck

@BindingAdapter("android:adapterSetup")
fun setupRecyclerViewAdapter(view: RecyclerView, viewModel: PaginationViewModel) {

    view.layoutManager = LinearLayoutManager(view.context)
    view.adapter = viewModel.adapter
}

Marchuck

class PaginationViewModel(pagedListProvider: PagedListProvider<Person?>) : ViewModel() {

    val pagedListData = pagedListProvider.provide()

    val adapter = SwapiAdapter()
}

Marchuck

class SwapiAdapter(diffCallback: DiffUtil.ItemCallback<Person?>)
    : PagedListAdapter<Person, SwapiPersonViewHolder>(diffCallback) {

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): SwapiPersonViewHolder {
        val inflater = LayoutInflater.from(parent.context)

        val binding = DataBindingUtil.inflate<ItemSwapiPersonBinding>(
                inflater, R.layout.item_swapi_person, parent, false)
        return SwapiPersonViewHolder(binding)
    }

Marchuck

class SwapiPersonViewHolder(private val binding: ItemSwapiPersonBinding) : RecyclerView.ViewHolder(binding.root) {

    fun bind(item: Person?) {
        binding.personModel = SwapiPersonViewModel(item)
        binding.executePendingBindings()
    }
}

Marchuck

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools">
    <data>
        <variable
            name="personModel"
            type="pl.marchuck.pagingexample.pagination.adapter.SwapiPersonViewModel" />
    </data>
    <android.support.v7.widget.CardView ...>

Marchuck

#!/bin/bash

for i in "${@:3}"
do
   echo "generating  $i x $i icon..."
   sips -z $i $i  $1 --out $2_$i.png
done

Marchuck

class LoginViewController { 
  
  var userName: String = "joe@doe.com"
  
  let HOME_SEGUE = "HOME_SEGUE"
  let FORGOT_PASSWORD_SEGUE = "FORGOT_PASSWORD_SEGUE"

  func startHomeScreen(){
     self.performSegue(withIdentifier: HOME_SEGUE, sender: self)

Marchuck

protocol ImageDelegate{
  func onImageReceived(_ picker: ImagePickerController, didReceiveValue value: UIImage)
  func onCancel(_ picker: ImagePickerController)
}

class TakePictureController : UIViewController, ImageDelegate{
  
  func takePicture(){
    let imagePicker = ImagePickerController()
    imagePicker.delegate  = self//self conforms to ImageDelegate protocol