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import 'package:flutter/material.dart';

class TabBarWithBottomNavigationScreen extends StatefulWidget {

  @override
  _TabBarWithBottomNavigationScreenState createState() => _TabBarWithBottomNavigationScreenState();
}

class _TabBarWithBottomNavigationScreenState extends State<TabBarWithBottomNavigationScreen>  with SingleTickerProviderStateMixin {

valterh4ck3r

import 'package:flutter/material.dart';
import 'dart:math' as math;

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(

valterh4ck3r

final RegExp email = RegExp(
    r"^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]"
    r"{0,253}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,253}[a"
    r"-zA-Z0-9])?)*$",
    caseSensitive: false,
    multiLine: false);

final RegExp mobileBrazilianPhone = RegExp(r"^\(?0?\d{2}\)? ?9 ?\d{4}-?\d{4}$",
    caseSensitive: false, multiLine: false);

valterh4ck3r

// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'dart:async';

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';

valterh4ck3r

How to install virtualenv:

Install pip first

sudo apt-get install python3-pip

Then install virtualenv using pip3

sudo pip3 install virtualenv 

valterh4ck3r

How to link an Android app to a local dependency

Disclaimer: This is dumb. If anybody knows a better way, I'm all ears.

You have two Android projects. One is a library and one is an app that depends on that library. Both are on your local machine.

Now, say you want to test the library in the app before you publish it. Here's what you do.

You have an app and a lib:

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Project Title

One Paragraph of project description goes here

Getting Started

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See deployment for notes on how to deploy the project on a live system.

Prerequisites

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#!/bin/bash

export TKN=$(curl -X POST 'http://localhost:8080/auth/realms/master/protocol/openid-connect/token' \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "username=admin" \
 -d 'password=admin' \
 -d 'grant_type=password' \
 -d 'client_id=admin-cli' | jq -r '.access_token')

curl -X GET 'http://localhost:8080/auth/admin/realms' \

valterh4ck3r

Guia Promises

Pode-se afirmar que no momento Promises são a forma mais "padrão" no momento de se tratar com assincronismo no JS. Para quem trabalha com javascript, conhecê-las é essencial. Uma dificuldade comum é que esta API tem uma curva de aprendizado um tanto acentuada de início, especialmente se comparado com as alternativas mais antigas: callbacks e o módulo async. No meu caso, levei ao menos uns 3 meses pra "cair a ficha".

-- na verdade promises ainda são um remendo para o problema do assincronismo do JS. Elas ainda possuem certa dificuldade

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public class MutableHttpServletRequest extends HttpServletRequestWrapper {
	
	private Map<String,String[]> parameters = new HashMap<String,String[]>();

	public MutableHttpServletRequest(HttpServletRequest request) {
		super(request);
	}

	public void setParameter(String name, String value) {
		parameters.put(name, new String[] {value});