Language Selection

English French German Italian Portuguese Spanish

Java and Python Programming

Filed under
Development
  • How To Solve Error: “No Main Class Found in NetBeans”
  • A review of Processing books

    Processing is the free and open Java development environment that targets artists who are intrigued by generative code. In essence it is the Java language with a friendly development interface and built-in libraries to get you started.

    There are plenty of ways to learn Processing, including the tutorials on the organisation's website, and the built-in examples that come with the distribution. But if you prefer a printed book, keep reading. This article will review nine available publications, so you can make an informed purchase decision.

    For the sake of completeness I will also append information on two books I haven't had a chance to read.

  • The Digital Cat: Dissecting a Web stack

    Having recently worked with young web developers who were exposed for the first time to proper production infrastructure, I received many questions about the various components that one can find in the architecture of a "Web service". These questions clearly expressed the confusion (and sometimes the frustration) of developers who understand how to create endpoints in a high-level language such as Node.js or Python, but were never introduced to the complexity of what happens between the user's browser and their framework of choice. Most of the times they don't know why the framework itself is there in the first place.

    The challenge is clear if we just list (in random order), some of the words we use when we discuss (Python) Web development: HTTP, cookies, web server, Websockets, FTP, multi-threaded, reverse proxy, Django, nginx, static files, POST, certificates, framework, Flask, SSL, GET, WSGI, session management, TLS, load balancing, Apache.

    In this post, I want to review all the words mentioned above (and a couple more) trying to build a production-ready web service from the ground up. I hope this might help young developers to get the whole picture and to make sense of these "obscure" names that senior developers like me tend to drop in everyday conversations (sometimes arguably out of turn).

  • Restoring intuition over multi-dimensional space

    We would not be human if we did not curse things. As beings that are confined in a three-dimensional world, we tend to blame space whenever we have a problem to visualize data that extend to more than three dimensions. From scientific books and journal papers to simple blog articles and comments the term: “curse of dimensionality” is being repeated like a mantra, almost convincing us that any object, whose nature extends to something more than just “3D” is out of reach to our brains.

    This article is going to discuss neither data visualization nor seek to conform to the common opinion that highly-dimensional space is incomprehensible.

    Quite opposite: the highly-dimensional space is not incomprehensible. It is just weird and less intuitive. Fortunately, take advantage of some mathematical tools and use them as a “free ticket” to gain more intuition. More precisely, we will present three “routes” we can use to get a better feeling on how things play out in “ND space.”

    [...]

    In this article, we have looked into three aspects of the multidimensionality of space. As we couldn’t visualize it (we didn’t even try…), we took advantage of some mathematical mechanisms to gain a bit more insight into the strange behavior of this world. Although not backed with any ultimate proofs, we hope that the mathematical reasoning just presented can spark some inspiration, intuition, and imagination, which is something that is often needed when having to cope with N-dimensions.

  • Airflow By Example

    Apache Airflow is a very interesting, popular and free tool to create, manage and monitor workflows, for example if you want to do ETL (Extract / Transform / Load) on data.

    This sort of enterprise software often may seem complicated or overly unrelated to our everyday experience as developers but ... is it, really? How about if I just want to watch some TV shows? And experiment with some enterprise-level software at the same time?

    Let's do that by learning how to use Airflow to watch TV.

More in Tux Machines

digiKam 7.7.0 is released

After three months of active maintenance and another bug triage, the digiKam team is proud to present version 7.7.0 of its open source digital photo manager. See below the list of most important features coming with this release. Read more

Dilution and Misuse of the "Linux" Brand

Samsung, Red Hat to Work on Linux Drivers for Future Tech

The metaverse is expected to uproot system design as we know it, and Samsung is one of many hardware vendors re-imagining data center infrastructure in preparation for a parallel 3D world. Samsung is working on new memory technologies that provide faster bandwidth inside hardware for data to travel between CPUs, storage and other computing resources. The company also announced it was partnering with Red Hat to ensure these technologies have Linux compatibility. Read more

today's howtos

  • How to install go1.19beta on Ubuntu 22.04 – NextGenTips

    In this tutorial, we are going to explore how to install go on Ubuntu 22.04 Golang is an open-source programming language that is easy to learn and use. It is built-in concurrency and has a robust standard library. It is reliable, builds fast, and efficient software that scales fast. Its concurrency mechanisms make it easy to write programs that get the most out of multicore and networked machines, while its novel-type systems enable flexible and modular program constructions. Go compiles quickly to machine code and has the convenience of garbage collection and the power of run-time reflection. In this guide, we are going to learn how to install golang 1.19beta on Ubuntu 22.04. Go 1.19beta1 is not yet released. There is so much work in progress with all the documentation.

  • molecule test: failed to connect to bus in systemd container - openQA bites

    Ansible Molecule is a project to help you test your ansible roles. I’m using molecule for automatically testing the ansible roles of geekoops.

  • How To Install MongoDB on AlmaLinux 9 - idroot

    In this tutorial, we will show you how to install MongoDB on AlmaLinux 9. For those of you who didn’t know, MongoDB is a high-performance, highly scalable document-oriented NoSQL database. Unlike in SQL databases where data is stored in rows and columns inside tables, in MongoDB, data is structured in JSON-like format inside records which are referred to as documents. The open-source attribute of MongoDB as a database software makes it an ideal candidate for almost any database-related project. This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you the step-by-step installation of the MongoDB NoSQL database on AlmaLinux 9. You can follow the same instructions for CentOS and Rocky Linux.

  • An introduction (and how-to) to Plugin Loader for the Steam Deck. - Invidious
  • Self-host a Ghost Blog With Traefik

    Ghost is a very popular open-source content management system. Started as an alternative to WordPress and it went on to become an alternative to Substack by focusing on membership and newsletter. The creators of Ghost offer managed Pro hosting but it may not fit everyone's budget. Alternatively, you can self-host it on your own cloud servers. On Linux handbook, we already have a guide on deploying Ghost with Docker in a reverse proxy setup. Instead of Ngnix reverse proxy, you can also use another software called Traefik with Docker. It is a popular open-source cloud-native application proxy, API Gateway, Edge-router, and more. I use Traefik to secure my websites using an SSL certificate obtained from Let's Encrypt. Once deployed, Traefik can automatically manage your certificates and their renewals. In this tutorial, I'll share the necessary steps for deploying a Ghost blog with Docker and Traefik.