rapPayne

@override
Widget build(BuildContext context) {
  return Scaffold(
    appBar: AppBar(title: Text("Prestige Worldwide Registration")),
    // TODO 1: Wrap the body in a Form widget
    body: Form(  // <-- Add this widget. (Don't forget to close it!)
      child: Container(
        alignment: Alignment.center,
        child: Column(
          children: <Widget>[

rapPayne

@override
Widget build(BuildContext context) {
  return Scaffold(
    appBar: AppBar(title: Text("Prestige Worldwide Registration")),
    // TODO 1: Wrap the body in a Form widget
    body: Container(
      alignment: Alignment.center,
      child: Column(
        children: <Widget>[
          _buildEmailField,

rapPayne

import 'package:flutter/material.dart';
import 'package:cloud_firestore/cloud_firestore.dart';

class PeopleUpsert extends StatefulWidget {
  @override
  _PeopleUpsertState createState() => _PeopleUpsertState();
}

class _PeopleUpsertState extends State<PeopleUpsert> {
  GlobalKey<FormState> _key = GlobalKey<FormState>();

rapPayne

// Say goReadAFile() is slow and returns a Future
Future myFuture = goReadAFile();

rapPayne

class FooState extends State<FooComponent> {
  String _firstName;  // <-- A variable known by the whole class
  Widget build(BuildContext context) {
    // return a widget
  }
  void _myCallback(String someVar) {
    _firstName = someVar;  // <-- Getting a value OUT of an async callback
  }
}

rapPayne

Type of future	When it's ready, I'll have a ...
Future<String>	... string
Future<Foo>	... Foo
Future>	... Map whose keys are Strings and whose values are dynamic.

rapPayne

Future<Bar> someFunction() async {
  Foo theIncomingData = await somethingThatReturnsAFuture();
  return new Bar();
}

rapPayne

Bar someFunction() {
  Foo theIncomingData = someFunction();
  return new Bar();
}

rapPayne

void myCallback(Foo theIncomingData) {
 doSomethingWith(theIncomingData);
}

rapPayne

@override
Widget build(BuildContext context) {
  return StoreProvider<AppState>(
    store: this.store,
    child: StoreConnector<AppState, AppState>(converter: (store) {
      return store.state;
    }, 
    builder: (context, callback) {
      if (store.state.showFilmDetails)                         // <-- 9
        return showFilmDetails(this.store.state.selectedFilm); // <-- 9