francbreno

package easy.datastructures.linkedlist;

public interface DoublyLinkedListBehaviors<T> extends LinkedListBehaviors<T> {

}

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package easy.datastructures.array;

import java.util.Arrays;
import java.util.Iterator;

@SuppressWarnings("unchecked")
public class Array<T> implements Iterable<T>, ArrayBehaviors<T> {

	protected T[] array; // Internal structure. FIXED length
	protected int len; // the number of elements added to the array

francbreno

package playground

import scala.annotation.tailrec
import scala.io.StdIn
import scala.util.Random

trait Action {
  def actionType(): String
}

francbreno

package playground.java.covariance;

import java.util.ArrayList;

public class CovarianceOnMethodInvocation {
    public static void main(String[] args) {
        new CovarianceOnMethodInvocation().run();
    }

    public void run() {

francbreno

Scala - OO

Classes and Constructors

class declaration (with a primary constructor):

class MongoClient(val host: String, val port: Int)

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const db = require('./connect')();
const crudServices = require('./knexCrud')(db);
const serviceFactory = require('./serviceFactory')(crudServices);

const App = function(serviceFactory) {
  const accountsService = serviceFactory('accounts');
  const usersService = serviceFactory('users');
  
  return {
    getAllAccounts: () => accountsService.getAll(),

francbreno

alter table entries add column transaction_id integer references transactions(id) not null;

select * from accounts

insert into transactions(value, description, destiny_account_id, origin_account_id)
values(5800.00, '05/2018 Salary', 19, 17);

insert into entries(value, account_id, transaction_id)
values(-5800.00, 17, 7);

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const logado = false;

const PrivateRoute = ({ render, ...rest }) => (
  <Route
    {...rest}
    render={props =>
      logado ? (
        render(props)
      ) : (
        <Redirect 

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import { createStore, combineReducers, applyMiddleware } from 'redux';
import { Provider, connect } from 'react-redux';
import thunk from 'redux-thunk';
import { v4 } from 'uuid';

// Users -------------------------------------------------------------------------------

const ADD_USER = 'ADD_USER';

const addUserAction = (user) => ({

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import React, { Component } from 'react';
import './App.css';

import LoginForm from './loginForm';
import RegistrationForm from './registrationForm';
import ConsumptionForm from './consumptionForm';

const PrivateContent = ({ user, children }) => (
  <div>
    <img alt="user avatar" src={ user.photoURL }/> { user.name } |  { user.email } |