Chullian

exFAT support on macOS seems to have some bugs because my external drives with exFAT formatting will randomly get corrupted.

Disk Utility is unable to repair this at first, but the fix is this:

Use diskutil list to find the right drive id.
You want the id under the IDENTIFIER column, it should look like disk1s1
Run sudo fsck_exfat -d <id from above>. eg sudo fsck_exfat -d disk1s3
-d is debug so you'll see all your files output as they're processed.
Answer YES if it gives you the prompt Main boot region needs to be updated. Yes/No?

Flutter

A quick cheatsheet of useful snippet for Flutter

Widget

A widget is the basic type of controller in Flutter Material. There are two type of basic Widget we can extend our classes: StatefulWidget or StatelessWidget.

Stateful

StatefulWidget are all the widget that interally have a dynamic value that can change during usage. It can receive an input value in the constructor or reference to functions. You need to create two classes like:

	fun calculateIroningPrice(serviceQuantity: Int, isAdd: Boolean) {
	var priceF = 0.0f
	if (isAdd) {
	priceF = App.instance.priceDetails.price + ironingPrice
	} else {
	if (App.instance.priceDetails.price > 0.0f)
	priceF = App.instance.priceDetails.price - ironingPrice
	}
	App.instance.priceDetails.apply {
	price = priceF

	class HomeFragment : BaseFragment<HomeVm>(), OnItemClickedListener<ItemsListContent> {

	override val layoutId = R.layout.fr_home
	override val viewModelClass = HomeVm::class.java

	private val eateryObserver = Observer<List<ItemsListContent>> { list ->
	recyclerEatery.adapter = context?.let { context -> HomeitemsAdapter(context, list, this) }
	}

	private val drinksObserver = Observer<List<ItemsListContent>> { list ->

	abstract class BaseFragment<T : BaseViewModel> : Fragment(), BaseView {

	override fun createViewModelFactory(): ViewModelProvider.NewInstanceFactory? {
	return null
	}

	override fun isNeedProgress() = true

	private val errorObserver = Observer<Throwable> { error ->
	baseView?.showSnack(error.localizedMessage)

	abstract class BaseActivity<T : BaseViewModel> : AppCompatActivity(), BaseView {

	protected abstract val layoutId: Int

	protected abstract val containerId: Int

	protected abstract val viewModelClass: Class<T>

	protected val viewModel: T by lazy(LazyThreadSafetyMode.NONE) { ViewModelProviders.of(this).get(viewModelClass) }