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Programming Leftovers

Submitted by Roy Schestowitz on Tuesday 29th of October 2019 03:28:24 AM Filed under
Development
  • Replication in Firebird 4: Configuration and practical examples

    Replication is a long-awaited feature that allows the creating of reliable high-performance database replicas without user-defined triggers and with full DDL support. This talk presents the replication subsystem architecture, possible replication modes, their impact on performance and available tuning options. We'll demonstrate how to set up a simple standby configuration and use it in practice.

  • Firebird on the road from v4 to v5

    This talk done at Firebird Conference 2019 describes the current state of the v4 development and reviews its key features (new data types, Batch API, timezones). Dimitry Yemanov spoke about the future of Firebird development, including the updated release plan and expected post-v4 features. Review of upcoming features for Firebird 5

  • Cleaning Up Currency Data with Pandas

    The other day, I was using pandas to clean some messy Excel data that included several thousand rows of inconsistently formatted currency values. When I tried to clean it up, I realized that it was a little more complicated than I first thought. Coincidentally, a couple of days later, I followed a twitter thread which shed some light on the issue I was experiencing. This article summarizes my experience and describes how to clean up messy currency fields and convert them into a numeric value for further analysis. The concepts illustrated here can also apply to other types of pandas data cleanup tasks.

  • Python Community Interview With Al Sweigart

    This week, I’m joined by Al Sweigart, a familiar name in the Python community. Al is an accomplished developer, conference speaker, teacher, and origamist. (Yes, you read that correctly!) But some may know him best as the author of many Python programming books, including the bestselling book Automate the Boring Stuff with Python and our top pick, Invent Your Own Computer Games with Python. So, without any further ado, let’s get into it!

    [...]

    I didn’t learn that much knowledge-wise, but I did pick up the idea that programming was just a thing you could learn to do like anything else. It didn’t require super smarts or Olympic-level training to do.

    My first programming language was BASIC and soon after Qbasic, but I also picked up a little C, Visual Basic, Perl, Java, PHP, and JavaScript. It seems like a lot, but I never really mastered any of them. I just learned enough to complete whatever project I was working on in those languages at the time.

    I got into Python around 2005, and sort of stopped learning new languages after that. I keep feeling the urge to explore new ones (Kotlin, Rust, and Dart have been in my sights for a while), but Python is just so easy to use for so many areas that I haven’t had a strong enough pull away from it yet.

  • Loan Amortisation Schedule using R and Python

    In this post, we will explain how you can calculate your monthly loan instalments the way bank calculates using R and Python. In financial world, analysts generally use MS Excel software for calculating principal and interest portion of instalment using PPMT, IPMT functions. As data science is growing and trending these days, it is important to know how you can do the same using popular data science programming languages such as R and Python.

  • Practical Log Viewers with Sanic and Elasticsearch - Designing CI/CD Systems

    One of the critical pieces in a build system is the ability to view build and test output. Not only does it track progress as the build transitions through the various phases, it’s also an instrument for debugging.

    This chapter in the continuous builds series covers how to build a simple log viewer. You’ll find details on retrieving log entries from Docker containers, serving them through Python, linking from a GitHub pull request, and highlighting the data for easy reading.

    Creating a log viewer is not as complicated as you might think. You’ll need permanent storage for the logs, a REST API to retrieve them, and some web code to help highlight areas of interest and offer a “live reload” function.

  • I've been involved in software proj

    Why Python is considered the top programming language ahead of JavaScript and C++

  • Asynchronous Tasks Using Flask, Redis and Celery

    As web applications evolve and their usage increases, the use cases also diversify. We are now building and using websites for more complex tasks than ever before. Some of these tasks can be processed and feedback relayed to the users instantly, while others require further processing and relaying of results later. The increased adoption of internet access and internet-capable devices has led to increased end-user traffic.

    In a bid to handle increased traffic or increased complexity of functionality, sometimes we may choose to defer the work and have the results relayed at a later time. This way, we do not get to keep the user waiting for an unknown time on our web application, and instead send the results at a later time. We can achieve this by utilizing background tasks to process work when there is low traffic or process work in batches.

  • AWS Throws Its Weight Behind Rust Project

    AWS, which the Rust project has used for years, is sponsoring the project in the form of "promotional credits".

»

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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.

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