haratak

import 'dart:core';

void main() {

  
List<String> texts= ['太郎','個体耳標 12383-0400-7','こたろう','平成 18年 2月 1日生'];
//   print('${texts.whereType(String)}');

  void getNumber(List<String>texts,String query){
    switch(query){

haratak

Text(
                          '右上のメニューボタンから登録できます',
                          softWrap: true,
                          overflow: TextOverflow.ellipsis,
                          style: TextStyle(fontSize: 18),
                        ),

haratak

https://dartpad.dartlang.org/

haratak

import 'dart:io';

void main() async {
  task1();
  String text = await task2();
  task3(text);
}

void task1() {
  print('task1 completed');

haratak

Map<String ,int> phoneBook = {
  'Kyle' : 1234567832,
  'Amy' : 1234223543,
  'Michel' : 988347345,
};

main(){
  print(phoneBook['Amy']);
  phoneBook['Kevin'] = 393484728128;
  print(phoneBook['Kevin']);

haratak

import 'package:flutter/material.dart';

void main() {
  runApp(MaterialApp(
    title: 'Navigation Basics',
    home: FirstRoute(),
  ));
}

class FirstRoute extends StatelessWidget {