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Programming Leftovers

Submitted by Roy Schestowitz on Saturday 3rd of October 2020 11:41:53 PM Filed under
Development
  • String Length in C Language

    A string in C language is an array of characters that is terminated with a null character (\0). The string length is the number of characters in a string. In the string length ‘\0,’ a character is not counted.

  • Dirk Eddelbuettel: pinp 0.0.10: More Tweaks

    A new version of our pinp package arrived on CRAN two days ago, roughly one year after the previous release. The pinp package allows for snazzier one or two column Markdown-based pdf vignettes, and is now used by a few packages. A screenshot of the package vignette can be seen below. Additional screenshots are at the pinp page.

  • Apache's TVM Deep Learning Compiler Picks Up WebAssembly, Better Rust Support

    The first release candidate of TVM 0.7, the Apache incubator project providing a deep learning compiler stack, is now available.

    Apache TVM is a compiler stack for deep learning systems in providing end-to-end compilation support for a variety of back-ends from all of the models from key deep learning frameworks. TVM supports a variety of targets including the leveraging of LLVM for supporting code generation on the major CPU architectures as well as the likes of NVIDIA CUDA. With the Apache 0.7 release candidate there is even WebGPU and WebAssembly support for outputting to those browser-focused standards.

  • Steve Kemp: Writing an assembler.

    Recently I've been writing a couple of simple compilers, which take input in a particular format and generate assembly language output. This output can then be piped through gcc to generate a native executable.

    Public examples include this trivial math compiler and my brainfuck compiler.

    Of course there's always the nagging thought that relying upon gcc (or nasm) is a bit of a cheat. So I wondered how hard is it to write an assembler? Something that would take assembly-language program and generate a native (ELF) binary?

    And the answer is "It isn't hard, it is just tedious".

  • The Tau Station Kickstarter has gone live! (Oops)

    Tau Station is the world's first Biblio-RPG. It's a massive, immersive, narrative sci-fi MMO. Missions in most games are things like "kill five rabid dogs and get a dagger." BORING. Our missions are rich, immersive, short stories where you control the outcome.

    It's 400,000 plus lines of Perl, with a PostgreSQL backend.

  • Python Numbers and Arithmetic Operations

    Python is a powerful, efficient, and modern high-level programming language. When developing software systems, it is necessary to use numerical and arithmetic operations for performing calculations. Python provides a variety of numbers and arithmetic operations for this purpose. In this article, we will teach you about Python numbers, conversion of one data type into another data type, and arithmetic operations. The Spyder3 editor is used to create and run the Python script.

  • Unravelling rich comparison operators

    For the next part of my blog series on pulling apart Python's syntactic sugar, I'm going to be tackling rich comparison operators: ==, !=, >, <, >=, <=.

  • Adding some reporting functionality

    I just added some code to the surveil app, the beginnings of what will be a reporting feature.

    [...]

    I found that the surveil app uses quite a bit of bandwidth when sending video, on the mobile network anyway, so I added an option to just store the videos locally a while ago.

    That works, but then the surveillance app can stop making videos for whatever reason and nobody's the wiser.

    So I figured it would be nice with a daily report of the videos created, so that it is possible to keep an eye on things, even if videos aren't mailed.

  • Weekly Python StackOverflow Report: (ccxliv) stackoverflow python report
  • Sealed Java State Machines

    A few years back I posted about how to implement state machines that only permit valid transitions at compile time in Java.

    This used interfaces instead of enums, which had a big drawback—you couldn’t guarantee that you know all the states involved. Someone could add another state elsewhere in your codebase by implementing the interface.

    Java 15 brings a preview feature of sealed classes. Sealed classes enable us to solve this downside. Now our interface based state machines can not only prevent invalid transitions but also be enumerable like enums.

»

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Dilution and Misuse of the "Linux" Brand

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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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