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Code Issues Releases Wiki Activity

Add flutter_lints to null_safety (#828)

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This commit is contained in:
Brett Morgan
2021-06-07 20:53:25 +10:00
committed by GitHub
parent 4069bfbe9e
commit 39b0049345
12 changed files with 86 additions and 12 deletions
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6
null_safety/null_safe_app/lib/goodapp.dart
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@@ -7,6 +7,8 @@ import 'package:flutter/material.dart';
import 'services.dart';
class GoodMyApp extends StatelessWidget {
const GoodMyApp({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
final localizedAppName = Config.getAppName();
@@ -14,13 +16,13 @@ class GoodMyApp extends StatelessWidget {
List<Widget> tempWidgets;
if (temperatures == null) {
tempWidgets = [Text('Temperature: Failed getting forecast :-(')];
tempWidgets = [const Text('Temperature: Failed getting forecast :-(')];
} else {
// Null safety uses flow analysis. The code checked for null in the branch
// above, so in this branch it known that temperatures cannot be null.
// Notice how we access temperatures without getting an analysis error.
tempWidgets = [
Text('Temperature next 3 days:'),
const Text('Temperature next 3 days:'),
for (final t in temperatures)
// We first use the conditional member access operator to only call
// round() and toString() if t isn't null. We then test if that