Hi people!!

Today, I will teach you how to create the calculator with basic functions.

But before starting, is important to refer to the CRUD definition.

The CRUD defintion are the acronyms for Create, Read, Update and Delete and these are the four basic operations used in relational databases.

In…

Agora que concluímos a instalação do Hadoop podemos prosseguir a instalação do Apache Spark com dois slaves, tal como no tutorial anterior no qual instalamos o Apache Hadoop faremos a nossa instalação por passos simples para facilitar o processo.

Introdução

O Spark é um framework open-source para processamento de Big Data…

Hi people!!

In this tutorial, we will install and configure Hadoop on Ubuntu with single-node only.

But before we start, we need the following requirements:

• Ubuntu 18.04 (Can be used on a virtualized machine in VirtualBox);
• Java installed;

After installing ubuntu, to make sure you have Java installed, use the…

Neste tutorial, iremos mostrar como foi implementada a nossa API que é sobre o registo de Take Away. A mesma foi desenvolvida em JavaScript complementando ainda com mongoDB Atlas e o SwaggerUI.

Vamos então indicar todos os passos precisos para a criação desta API

1º Passo: Criação do Projeto

2º Passo: Criação da Base de Dados

3º Passo: Desenvolvimento da API

4º…

Hi people!!

Today, I will explain the Distributed Systems Concept, concretely:

• What it is?
• Some examples of the same
• The features
• Advantages and disadvantages of a Distributed System

What is a Distributed System?

In general, a Distributed System is a system with several components that is found on different machines so that it is connected…

Hi people!!

In this tutorial, you will learn how to make a calculator API with elementary arithmetic operations, using Swagger.

Swagger is an interface description language for describing RESTful APIs expressed using JSON and is used in conjunction with a set of Open Source software tools to design, build, document…

Hi people!!

In this tutorial, I will show you how to build an API using the JWT authentication in LoopBack 4.

1st step: Install node.js the Todo example and install the JWT authentication extension

npm init
lb4 example todo
cd loopback4-example-todo
npm i --save @loopback/authentication @loopback/authentication-jwt

2nd step: Create the Controller for login

Hi people!!

In this tutorial, I will show you how to build an API using node.js and, especially, LoopBack 4.

To do this, you only need the PC’s command line.

1st step: Install node.js and LoopBack 4

npm init
npm i -g @loopback/cli

2nd step: Create the app scanffolding