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Programming Leftovers

Submitted by Roy Schestowitz on Tuesday 3rd of November 2020 10:35:46 PM Filed under
Development
  • Excellent Free Tutorials to Learn Objective-C

    Objective-C is a general purpose programming language which is a superset of the C programming language and provides object-oriented capabilities and a dynamic runtime. Objective-C inherits the syntax, primitive types, and flow control statements of C and adds syntax for defining classes and methods.

    It also adds language-level support for object graph management and object literals while providing dynamic typing and binding, deferring many responsibilities until runtime. Objective-C can incorporate blocks of C code (as well as C++), making it very versatile for application development.

    Objective-C is the primary programming language used when writing software for OS X and iOS.

  • GCC 11's x86-64 Microarchitecture Feature Levels Are Ready To Roll - Phoronix

    The Linux x86_64 micro-architecture feature levels have taken shape this year for different feature/performance levels based on a CPU's capabilities. Both LLVM Clang 12 and GCC 11 are ready to go in offering the new x86-64-v2, x86-64-v3, and x86-64-v4 targets.

    These x86_64 micro-architecture feature levels have been about coming up with a few "classes" of Intel/AMD CPU processor support rather than continuing to rely on just the x86_64 baseline or targeting a specific CPU family for optimizations. These new levels make it easier to raise the base requirements around Linux x86-64 whether it be for a Linux distribution or a particular software application where the developer/ISV may be wanting to compile with greater instruction set extensions enabled in catering to more recent Intel/AMD CPUs. Having this set of four versions/levels also reduces the number of possible combinations if wanting to enable Function Multi-Versioning (FMV) or the like without resorting to every possible Intel/AMD CPU family. And we'll see what else comes of this and the effort around some distributions looking to raise the Linux x86_64 CPU requirements.

  • Create a list in a Flutter mobile app | Opensource.com

    Flutter is a popular open source toolkit for building cross-platform apps. In "Create a mobile app with Flutter," I demonstrated how to install Flutter on Linux and create your first app. In this article, I'll show you how to add a list of items in your app, with each item opening a new screen.

  • Flutter Web: A Fractal of Bad Design

    The web has a long and rich history dating back to the nineties at CERN. Back then Tim Berners-Lee laid the foundation of HTML that is still around today. There have been attempts to replace it with varying success but none have been successful, for good reason. HTML and the later invention of CSS are a remarkably powerful set of tools to build all kinds of experiences on the web. People are still trying to replace HTML, which brings us to the topic of this post: Flutter Web.

    Flutter Web is part of Google’s Flutter framework for building cross platform UI. Hailed by many developers as the best thing since sliced bread, my opinion of it lacks the rose coloured glasses. I haven’t looked at Flutter for other platforms than web so I cannot comment on it other than that the general principle of Flutter is a terrible idea. Flutter works by throwing away the native UI toolkits provided by the platform and rendering everything from scratch using OpenGL et al. This translates extremely poorly to the web platform in particular. It’s worth noting that Flutter for Web is currently in beta and the problems I am about to detail could be addressed. However, I believe these issues are fundamental to Flutter’s design choices so I feel confident in my criticism.

  • Simulating Real-World Processes in Python With SimPy – Real Python

    The real world is full of systems, like airports and highways, that frequently experience congestion and delay. When these systems are not optimized, their inefficiency can lead to countless unhappy customers and hours of wasted time. In this course, you’ll learn how to use Python’s simpy framework to create virtual simulations that will help you solve problems like these.

  • How to Use Platform and Keyword Module in Python

    The platform module provides an API to get information about the underlying system/platform where our code runs. Information such as OS name, Python Version, Architecture, Hardware information, etc. is exposed via platform module functions. This module does not require installation since it is part of the default libraries that comes with python installation.

  • PyCoder’s Weekly: Issue #445 (Nov. 3, 2020)
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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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