Post Archive

2026

La Matematica Necessaria per l’Intelligenza Artificiale e gli LLM

Quali sono le basi matematiche necessarie per comprendere a fondo l’Intelligenza Artificiale Generativa e i Large Language Models? Una panoramica delle discipline fondamentali.

L’evoluzione di Java dal JDK 1.0 al JDK 21

Un viaggio attraverso le tappe fondamentali che hanno trasformato Java in uno dei linguaggi di programmazione più influenti della storia

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2025

Sviluppo di applicazioni Java EE sicure 2

Dalle minacce alle migliori pratiche Parte 2

Developing Secure Java EE Applications 2

Understanding Common Threats Part 2

Sviluppo di applicazioni Java EE sicure 1

Dalle minacce alle migliori pratiche Parte 1

Developing Secure Java EE Applications 1

From Threats To Best Practices Part 1

Software Architect

A Software Architect is a professional who designs and develops the architecture of a software system

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2024

Monads: A First Definition

An introduction to monads in functional programming: algebraic structures, the formal triplet (T, η, μ), and the Maybe monad example

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2023

A list of books on Clojure

A list of Clojure books that I think are great

Using Prolog to Build Expert Systems

Building expert systems with Prolog: a practical approach

Passing Parameters to Methods/Functions/Procedure in Programming Languages

Parameter passing strategies in programming: by value, by reference and beyond

What is an inference engine?

How inference engines work and their role in expert systems

What is an expert system?

Understanding expert systems: definition, architecture and applications

Understanding Domain Specific Languages

What Domain-Specific Languages are and when to use them

Cobol overview

A comprehensive overview of the COBOL programming language

The equals() method of the Object class in Java

Learn how the equals method works and how to use it correctly

Explore the World of Artificial Intelligence

Five Websites to Boost Your Productivity and Creativity

The Data Model Resource Book Vol 1 & 2

About the series book…

I am replacing my old bash scripts with Python #2.

Python script to zip GlassFish logs and archive them by year and month. The script deletes the files after zipping them.

I am replacing my old bash scripts with Python #1.

Copy a list of directories with their contents to a shared folder.

The hashCode method of the Object class in Java

Learn how the hashCode method works and how to use it correctly

The toString method of the Object class in Java

Learn how the toString method works and how to use it correctly

The transition from Java EE to Jakarta EE

What you need to know

The R Language

An overview of the R language for statistical computing and data analysis

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2022

Working with Strings using Streams and Lambdas.

Processing strings with Java Streams and Lambda expressions

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2021

Immutable classes and objects in Java

Understanding immutable classes and objects in Java

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2020

Restore remote database backup to local

How do I restore a remote Mysql database to local? With Python script!

How to detect the machine architecture

How to check if your Linux system is 32-bit or 64-bit

Fluent-API Tutorial

Different ways of implementing a Logo Language style turtle in Java.

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2019

Cool APIs and where to find them: the Objects.toString() method

Less code to handle null strings. Convert a string if null to an empty string.

Perché Java è ancora al top

Breve riflessione aggiornata sul perché Java è ancora rilevante dopo oltre 20 anni dalla sua nascita

Why Java is still on top

Brief updated reflection on why Java is still relevant more than 20 years after its inception

About Clojure

Some information about the Clojure programming language

Downloading remote files with Python #2

Let’s continue with the automation and see how to unzip the .gz files

The programming language Scala

An overview of the Scala programming language and its key features

Downloading remote files with Python #1

Automating recurring tasks such as downloading remote files locally

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2018

Turing Machine

Basic concepts and information on Turing Machines, accepted language, recursively enumerable and recursiv

From Context-Free Grammar (CFG) to Pushdown Automata (PDA)

Construction of a stack automaton (PDA) from a CF grammar

From Pushdown Automata (PDA) to Context-Free Grammar (CFG)

Construction of a Context-Free Grammar from a Pushdown Automata

Prefix Property

Pushdown Automata (PDA) and language recognition problems with special features

Context-Free Languages Properties

Context-free language properties and considerations

Pumping Lemma for Context-Free Languages

The pumping lemma version for context-free languages

CFG in Chomsky and Greibach’s Normal Form

Chomsky and Greibach’s context-free grammar in normal form, how they are made and why they are interesting

Alphabets, Symbols, Strings and Languages

What are alphabets, symbols and strings from the point of view of theoretical computer science

La classe java.time.temporal.ChronoUnit

Calcolare la differenza tra due date con ChronoUnit

The java.time.temporal.ChronoUnit class

Calculating the difference between two dates with ChronoUnit

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2017

Come includere jar esterni nel mio progetto Netbeans

Come aggiungere librerie JAR esterne a un progetto NetBeans

Github pages does not update my site with jekyll.

Joys and sorrows of maintaining your own site with Jekyll.

How can I include external jar in my Netbeans project

How to add external JAR libraries to a NetBeans project

Data Science Origins And Motivations

All of us are averse to uncertainty

Operatore null-coalescing del C# in Java

Come implementare il pattern dell’operatore null-coalescing di C# in Java

C# null-coalescing operator in Java

Implementing the C# null-coalescing operator pattern in Java

MySQL: Illegal mix of collations for operation union

About MySQL error illegal mix of collations for operation union

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2016

What are the methods of the Object class?

A guide to the methods of the Java Object class: clone, equals, hashCode, toString, finalize, notify and wait

Can we execute code before the main(String[]) method ?

How to execute code before the main method in Java using static initializers

Are constructors inheritable?

Are constructors inheritable? Can a subclass call the constructor of the parent class?

How can you limit inheritance for a class?

Techniques to restrict class inheritance in Java

Checking nic.it droptime files with R

Monitoring nic.it domain droptime files with R scripts

Big Data, Data Science, Databases the fundamentals #2

Before DBMSs, how was it done?…

Big Data, Data Science, Databases the fundamentals #1

When we talk about Big Data, we are talking about an evolution of databases..

Interfaces with the external world in R

Interfacing R with external data sources: files, databases and web APIs

Functions that implement cycles in R

Using apply, sapply and lapply to implement loops in R

Date, time and interval objects in R

Working with date, time and interval objects in R

The control structures of R

Managing the programme execution flow with R

Design Patterns State

Features and sample Java code reduced to the essentials

R language introduction

A first introduction to the R programming language

Design Pattern Visitor

The Visitor design pattern explained with practical Java examples

Design Patterns Interpreter

Minimal example Java code on Interpreter pattern

The Chain Of Responsibilityeton design pattern

Minimal CoF pattern example code

The Design Pattern Strategy

Minimal example code on the Strategy pattern

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2015

The java.time.LocalTime class

At last, something new on Dates in Java(8)

wsimport e Webservice .Net 2.0

Utilizzo di wsimport per generare stub client Java da un Web Service .NET 2.0

wsimport and Webservice .Net 2.0

Using wsimport to generate Java client stubs from a .NET 2.0 Web Service

How to install subversion (svn) on Ubuntu 14.04.02 LTS

Installing Subversion (SVN) on Ubuntu 14.04.02 LTS

Ubuntu 14.04.02 LTS How to install git

Installing Git on Ubuntu 14.04.02 LTS

How enable root user on Ubuntu 14.04.02 LTS

How to enable the root user on Ubuntu 14.04.02 LTS

Ubuntu 14.04.02 LTS 64bit: how to install Open SSH

Installing OpenSSH server on Ubuntu 14.04.02 LTS 64-bit

Enable the sudo command on debian 8

How to enable the sudo command on Debian 8

Secure logins and pages with JSF 2

Building a secure login web application with JSF 2.2

Creating a Custom Converter in JSF 2.2

Creating and registering a custom type converter in JSF 2.2

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2014

Dropdownboxes are easy with JSF 2.2!

Implementing dropdown select boxes with JSF 2.2

JSF 2 How to use comments

How to properly use comments in JSF 2 Facelets pages

Using Channels to Copy Files in Java

Using Java NIO Channels for efficient file copy operations

JSF 2 forcing tag-generated ids

How to force specific HTML element IDs in JSF 2 components

BFS Breadth First Search

Breadth-First Search (BFS) traversal algorithm for trees

DFS o Depth First Search

Depth-First Search (DFS) traversal algorithm for trees

Generic visit algorithm for a tree

A generic algorithm for visiting nodes in a tree data structure

Tree Linked List

Linked list representations of tree data structures

Trees indexed representations

Indexed representations of tree data structures

Tree in Java

Tree data structures: concepts, terminology and Java implementation

Structures indexed in depth

An in-depth look at indexed data structures and their properties

Queue

The queue data structure: FIFO principle and Java implementation

Stack

The stack data structure: LIFO principle and Java implementation

Linked List

The linked list data structure: concepts and Java implementation

Indexed structures

Understanding indexed data structures and their implementations in Java

Using HashMap in Java

A practical guide to using HashMap in Java

Computer Architecture: what is it?

Computer architecture is a branch of computer science that studies the design and implementation of information processing systems

Introduction to Machine Learning

Machine learning is a powerful technology that allows computers to learn from data without being explicitly programmed. It is used in a wide range of applications, including image recognition, text classification, and event prediction

Concatenating PDFs with iText in Java

How to concatenate multiple PDF files using the iText library in Java

Writing and reading files in Java 7 with try-with-resources

Reading and writing files in Java 7 using the try-with-resources statement

About the Limits of the Calculable

Physical limits of computation according to Meyer and Stockmeyer

How to swap two variables at once with Python

Swapping two variables in a single statement using Python tuples

Secure httpbase tomcat authentication

Configuring HTTP Basic authentication with Tomcat for secure access

Considerations on recursion

Key considerations and trade-offs when using recursion in programming

A Servlet to manage file downloads in Java

Implementing a Java Servlet that handles file downloads

Sending e-mails with attachments in Java

How to send emails with file attachments using the JavaMail API

String.format: A printf method for Java

Using String.format as a printf-style formatting method in Java

My thoughts on programming languages Part 4

Personal reflections on programming languages

My thoughts on programming languages Part 3

Personal reflections on programming languages

My thoughts on programming languages Part 2

Personal reflections on programming languages

My thoughts on programming languages Part 1

Personal reflections on programming languages

The CMS is dead, long live the Jekyll

The title is provocative and borderline captious…

How to install Jekyll on ubuntu 14.04.

Installing Jekyll on Ubuntu 14.04 for static site generation

SSH Log in without typing in the password.

Configuring SSH key-based authentication for passwordless login

HOWTO FIX error ‘illegal pattern character g’ JAXB in NetBeans .

Java Architecture for XML Binding

How to find jar file where a certain class is contained (deployed in GlassFish).

Locating the JAR file containing a specific class deployed in GlassFish

How to set Virtualbox to full screen on Ubuntu 14.04

Setting up full screen mode for VirtualBox on Ubuntu 14.04

Publishing a website with GitHub Pages.

How to publish a website using GitHub Pages and Jekyll

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2013

How to install Ant on Linux

Step-by-step guide to installing Apache Ant on Linux

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2012

BPEL (Business Process Execution Language)

An introduction to BPEL (Business Process Execution Language)

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2011

javascript according to Peter Paul Kock (PPK)

An overview of JavaScript according to Peter Paul Koch (PPK)

Use of keytool and jarsigner

How to use the JDK keytool and jarsigner utilities for signing JARs

Common errors when configuring Adobe PDF iFilter for SharePoint 2007

Troubleshooting Adobe PDF iFilter configuration issues in SharePoint 2007

Well Formatted referred to an XML document

What it means for an XML document to be well-formed

What is JAX-WS

Java API for XML Web Services

The Content is not allowed in prolog error

Every XML document we work on should be formatted correctly, saved with the right encoding, etc

MySQL: how to install on ubuntu linux mysql without synaptic or apt

Installing MySQL on Ubuntu Linux without using Synaptic or apt

MySQL: How to speed up restore operations from mysql dump

Techniques to speed up MySQL restore operations from mysqldump

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2010

MySQL: A problem when restoring a MySQL database…

Solving common issues when restoring a MySQL database from backup

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2009

Importing users and courses with I/O Task in Docebo

Importing users and courses into Docebo using I/O Tasks

How to restore the Docebo administrator user

Restoring the administrator user in the Docebo LMS platform

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2008

Objects in Java

Understanding objects and object creation in Java

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2007

The this keyword in Java

Understanding the this keyword and its usage in Java

The du Linux command

How to shows the disk space used

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2006

Passing parameters in Java

How parameter passing works in Java methods

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2005

Let’s delve into methods in Java

Understanding methods in Java: definition, invocation and return types

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2004

Classes and methods in Java

Defining classes in Java: access modifiers, class and instance entities

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2000

How to delete the command history on Linux

How to clear the command history in a Linux terminal

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