防采集标记:亢少军老师的课程和资料
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
void process(){
// var week = {
// 'Monday' : '星期一',
// 'Tuesday': '星期二',
// 'Wednesday' : '星期三',
// 'Thursday': '星期四',
// 'Friday': '星期五',
// 'Saturday': '星期六',
// 'Sunday': '星期日',
// };
var week = new Map();
week['Monday'] = '星期一';
week['Tuesday'] = '星期二';
week['Wednesday'] = '星期三';
week['Thursday'] = '星期四';
week['Friday'] = '星期五';
week['Saturday'] = '星期六';
week['Sunday'] = '星期日';
week['0'] = '星期一';
//assert(week['Monday'] == null);
print(week.length);
}
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Welcome to Flutter',
home: Scaffold(
appBar: AppBar(
title: Text('Welcome to Flutter'),
),
body: Center(
child: Text('Hello World'),
),
floatingActionButton: new FloatingActionButton(
onPressed: process,
child: Icon(Icons.add),
),
)
);}
}
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作者: 亢少军