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Programming Leftovers

Submitted by Roy Schestowitz on Tuesday 23rd of March 2021 06:48:47 PM Filed under
Development
  • Start programming in Deno, an alternative to Node.js

    Deno is a simple, modern, and secure runtime for JavaScript and TypeScript. It is an open source project created by Ryan Dahl, who developed Node.js. In Try Deno as an alternative to Node.js, I introduced Deno's features and explained how to install and run it.

    [...]

    When Ryan Dahl created Node.js, it proved to be wildly popular among not only web developers but programmers from many industries and hobbies. However, there are critiques about its security model. Ryan has designed Deno with security in mind, so a Deno module does not have file, network, or environment access unless you specifically enable it.

  • Nibble Stew: Writing a library and then using it as a Meson dependency directly from upstream Git

    Meson has many ways of obtaining dependencies. The most common is pkg-config for prebuilt dependencies and the WrapDB for building upstream releases from source. A lesser known way is that you can get dependencies [1] directly from the upstream project's Git repository. Meson will transparently download and build them for you. There does not seem to be that many examples of this on the Internet, so let's see how one would both create and consume dependencies in this way.

  • Use GLIB_VERSION_MIN_REQUIRED to avoid deprecation warnings | Philip Withnall

    tl;dr: Define GLIB_VERSION_MIN_REQUIRED and GLIB_VERSION_MAX_ALLOWED in your meson.build to avoid deprecation warnings you don’t care about, or accidentally using GLib APIs which are newer than you want to use. You can add this to your library by copying gversionmacros.h and using its macros on public APIs in your header files.

    With every new stable release, GLib adds and/or deprecates public API. If you are building a project against GLib, you probably don’t want to use the new APIs until you can reliably depend on a new enough version of GLib. Similarly, you want to be able to continue using the newly-deprecated APIs until you can reliably depend on the version of GLib which deprecated them.

    In both cases, the alternative is for your project to add conditional compilation blocks which use some GLib symbols if building against the new version of GLib, and others if building against the old version. That’s lots of work, and no fun.

    So to prevent projects using GLib APIs which are outside the range of GLib versions which those projects are tested to build and work against, GLib can emit deprecation warnings at compile time if APIs which are too new – or too old – are used.

  • Josef Strzibny: Creating a ZIP file in Elixir

    Creating ZIP files in Elixir is easy because of Erlang’s :zip module. Here’s how to create a ZIP archive both on disk and in memory.

  • How to Manage Python Dependencies using Virtual Environments

    When we start building a Python project that goes beyond simple scripts, we tend to start using third-party dependencies.

    When working on a larger project, we need to think about managing these dependencies in an efficient manner. And when installing dependencies, we always want to be inside virtual environments. It helps keep things nice and clean. It also helps avoid messing up our Python environment.

  • How to create virtual environments in Python 3 with venv module

    Open-source has changed the software landscape not only for end-users but also for software developers. One of the main powers of open-source is the speed at which tools are developed and upgraded. Being an open-source programming language, Python has benefited greatly from this agile development environment. In fact, the Python interpreter is updated so frequently nowadays that it is even hard to keep up with its versions. If that is not enough, Python is empowered by a vast third-party library catalog which is upgraded frequently as well. This vibrant ecosystem of the Python language and its third-party libraries, however, comes with its own set of challenges as well, one of them being version control.

  • How to Drop Duplicate Rows in Pandas Python

    Python is one of the most popular programming languages for data analysis and also supports various Python data-centric packages. The Pandas packages are some of the most popular Python packages and can be imported for data analysis. In almost all datasets, duplicate rows often exist, which may cause problems during data analysis or arithmetic operation. The best approach for data analysis is to identify any duplicated rows and remove them from your dataset. Using the Pandas drop_duplicates() function, you can easily drop, or remove, duplicate records from a data frame.

    [...]

    This article showed you how to remove duplicated rows from a data frame using the drop_duplicates() function in Pandas Python. You can also clear your data of duplication or redundancy using this function. The article also showed you how to identify any duplicates in your data frame.

»

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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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