moozi

//null safety double? a=null; a=10.05; a=null; print(a?.toInt()); // a가 null이면 null리턴. 아니면 toInt()실행 // if(a!=null) // return a.toInt(); // else // return null; double b; // non nullable a=10; b=a!; // nullable to non nullable print(b); double c; a=7; c=a??100; //a가 null이면 100을 대입. 아니면 a값을 대입 print(c);

http://naver.me/Gguvfe6z

https://drive.google.com/file/d/1mfKKLSArzzLAxfncaoDB39vWYTgUVX-e/view?usp=sharing kakaomap_test.zip drive.google.com

import 'package:flutter/material.dart'; import 'package:flutter/services.dart'; import 'dart:async'; class HomeScreen extends StatefulWidget { const HomeScreen({Key? key}) : super(key: key); @override State createState() => _HomeScreenState(); } // ❷ State 정의 class _HomeScreenState extends State { final PageController pageController = PageController(); @override void initState() { super.initStat..

https://drive.google.com/file/d/1zfxBmS5v7ef2Kw_DgTYbAtAbnKVNGp6t/view?usp=sharing

-- root 로 접속 해서 create user 'musthave'@'%' identified by '1234'; grant all privileges on *.* to 'musthave'@'%' identified by '1234'; -- musthave로 접속해서 create database jspdb default charset utf8 collate utf8_general_ci; use jspdb; create table member ( id varchar(10) not null, pass varchar(10) not null, name varchar(30) not null, regidate datetime default now() not null, primary key (id) ); creat..

- Dart Dev https://dart.dev/ Dart programming language Dart is a client-optimized language for fast apps on any platform dart.dev - Dart Korea Dev https://dart-ko.dev/ Dart 프로그래밍 언어 Dart는 모든 플랫폼에서 빠른 앱을 개발하기 위해 클라이언트에 최적화된 언어입니다 dart-ko.dev - Flutter Dev https://flutter.dev/ Flutter - Build apps for any screen Flutter transforms the entire app development process. Build, test, and deploy beautif..

https://blog.naver.com/njw1204/221654918683

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