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Programming Leftovers

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  • PostgreSQL JSON Functions

    JSON is an open-style JavaScript Object Notation used only for pairs of key-value data within the PostgreSQL database. JSON consists of many operators and functions to query the JSON information or data. In this article, we will demonstrate the working of JSON functions on some JSON data within the PostgreSQL tool. To work on JSON functions, one must have some JSON data in the database. Make sure you have PostgreSQL pgAmdin 4 installed and configured on your Windows 10 system because we have been implementing this article at Windows 10 on the PostgreSQL pgAdmin 4. Open your PostgreSQL Graphical user interface, e.g., pgAdmin, from the start bar of Windows 10 by searching it thoroughly. After that, it may require your master password and server password to get into it one after another. After adding the password, you have to tap on any database listed within the list of Servers and open the query tool to add some commands.

  • How to encode or decode a string using base64 in JavaScript

    Base64 encoding is an interesting way of representing information which is used to transform binary data into a string consisting of alphabets, digits and some special characters.
    Base64 is typically used to encode data that may be corrupted during transfer. Before eight bit bytes became a standard many systems such as SMTP (Email) used seven, six and even three bit bytes which led to data being lost during transfer between systems. So a new encoding scheme was developed which represented binary data in the form of text strings which could easily be transferred between systems without any damage to the data.

    Base64 is commonly used to encode the binary data of email attachments such as images and documents. It is also used to encode the images and audio files embedded in a webpage.

  • How to create a countdown timer in JavaScript

    Countdown timers are a kind of a virtual clocks which count the time until a specific date to mark the start or end of a special occasion. They were mostly used on the landing page of new upcoming websites but now they have found their way into e-commerce websites.

    The “time is running out” element on the countdown pages helps create urgency to generate more conversions on E-commerce websites. Timers can also be used on websites or blogs in order to display a countdown for special events i.e. anniversaries, birthdays, meetings etc. Countdown timers can also be used to count down the time till an offer becomes available

  • How to Convert a Number into a String in JavaScript

    Management of Data is a crucial task for any programmer; JavaScript is a very versatile programming language which offers multiple built-in methods to convert data into different data types. The .tostring() is one of these methods. The .tostring() method can be used to convert the data type of a variable from a number to a string. In this how-to guide we will learn to convert a number into a string using the .tostring() method in JavaScript.

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.