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| Future<http.Response> fetchAlbum() { | |
| return http.get(Uri.parse('https://jsonplaceholder.typicode.com/albums/1')); | |
| } |
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| var nome = 'Ulisses' | |
| var sobrenome = 'Hen'; | |
| var idade = 29; | |
| console.log('Meu nome é ' + nome + ' ' + sobrenome + ' e tenho ' + idade + ' anos.'); | |
| // exibe: Meu nome é Ulisses Hen e tenho 29 anos. |
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| Future<Album> fetchAlbum() async { | |
| final response = await http | |
| .get(Uri.parse('https://jsonplaceholder.typicode.com/albums/1')); | |
| if (response.statusCode == 200) { | |
| // Se o servidor retornou uma resposta 200 OK, | |
| // então analisa o JSON. | |
| return Album.fromJson(jsonDecode(response.body)); | |
| } else { | |
| // Se o servidor não retornou uma resposta 200 OK, | |
| // então lança uma exceção. |
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| FutureBuilder<Album>( | |
| future: futureAlbum, | |
| builder: (context, snapshot) { | |
| if (snapshot.hasData) { | |
| return Text(snapshot.data!.title); | |
| } else if (snapshot.hasError) { | |
| return Text('${snapshot.error}'); | |
| } | |
| // By default, show a loading spinner. | |
| return const CircularProgressIndicator(); |
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| import 'dart:async'; | |
| import 'dart:convert'; | |
| import 'package:flutter/material.dart'; | |
| import 'package:http/http.dart' as http; | |
| Future<Album> fetchAlbum() async { | |
| final response = await http | |
| .get(Uri.parse('https://jsonplaceholder.typicode.com/albums/1')); | |
| if (response.statusCode == 200) { | |
| // If the server did return a 200 OK response, | |
| // then parse the JSON. |
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| class _MyAppState extends State<MyApp> { | |
| late Future<Album> futureAlbum; | |
| @override | |
| void initState() { | |
| super.initState(); | |
| futureAlbum = fetchAlbum(); | |
| } | |
| // ··· | |
| } |
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| void main() { | |
| int idadePessoa = trazerIdadeDaTela(); | |
| // valor da direita para a esquerda | |
| // variavel <<< valor | |
| String nome = trazerNomeDaTela(); | |
| double salario = trazerSalarioDaTela(); | |
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| void main() { | |
| List<int> numeros = pegarNumerosNoBackEnd(); | |
| print(numeros[0]); | |
| print(numeros[1]); | |
| print(numeros[2]); | |
| print(numeros[3]); | |
| List<String> nomes = pegarNomesDePessoasNoBancoDeDados(); | |
| print(nomes.length); |
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| void main() { | |
| List<int> numeros = pegarNumerosNoBackEnd(); | |
| print(numeros[0]); | |
| print(numeros[1]); | |
| print(numeros[2]); | |
| print(numeros[3]); | |
| List<String> nomes = pegarNomesDePessoasNoBancoDeDados(); | |
| print(nomes.length); |
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| void main() { | |
| for (int i = -2; i < 5; i++) { | |
| if(i > 3){ | |
| print("indice maior que 3"); | |
| } | |
| if(i <= 3){ | |
| print("indice menor que 3"); | |
| } | |
| if(i != 3){ | |
| print("indice diferente de 3"); |
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