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Programming Leftovers

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  • Find Max Value in List Python

    None of us can dispute that Python is one of the most popular and useful programming languages. It offers a wide range of data types that are useful in a wide range of applications.

    One of the fundamental and versatile data types in Python is a list. A Python list is a collection of ordered items separated by commas. A python list is mutable, and you can change list items.

    This tutorial will show you how to create a python list and offer various ways to locate the maximum value inside a list.

  • How do I iterate through a string array in Python?

    In this article, we are going to see different methods for the string list iterations.

  • Get Value from Dictionary Python

    A dictionary is one of Python’s most fundamental data types. A Python dictionary is a collection of data values expressed in the form of key-value pairs.

    This tutorial will discuss using the get() function to get a value in a Python dictionary.

  • irk Eddelbuettel: RcppFastFloat 0.0.3: Maintenance

    The third release of RcppFastFloat arrived on CRAN. The package wraps fastfloat, another nice library by Daniel Lemire. For details, see the recent arXiv paper showing that one can convert character representations of ‘numbers’ into floating point at rates at or exceeding one gigabyte per second.

  • Exception Handling in Ruby

    Exception handling refers to the process of predicting and defining ways to handle errors raised in a program during execution. An error, in most cases, refers to an unexpected event or occurrence during the execution of the program. For example, an error may occur while reading a file either due to the file not existing or the user not having the right permission to read or write to the file.

    This tutorial will show you how to implement exception handling in Ruby using the raise and rescue blocks.

  • For Loops in Ruby

    Loops are a fundamental concept in any programming language. They allow us to execute a specific action continuously as long as a specified condition is true.

    Ruby also offers the concept of loops that can perform similar actions. However, each loop method takes a different approach, and the purpose of the loop dictates its efficiency.

    This quick guide will walk you through Ruby’s most common types of loops, including the while loop, for loop, and do while loop.

  • How to Create Classes and Objects in Ruby

    Ruby is a powerful programming language that offers modern features and tools. One such feature is support for object-oriented programming, including encapsulation polymorphism, abstraction, inheritance, and more.

    This tutorial will discuss a key concept in object-oriented programming: object and classes.

  • Ruby File I/O

    Working with files is practically a requirement for any developer. In most instances, if you are not saving data to a database, you are probably saving it to a file.

    This guide will show you how to use Ruby I/O methods to open, read, write, and create new files.

  • Ranges in Ruby

    Ranges are everywhere in our daily life. For example, it could be how long it will take to read this article, the distance between Moscow and London, the number of days between now and Christmas, etc.

    Although ranges may be implemented differently in a programming language, the core concept does not differ.

    In this tutorial, we will learn how to use ranges in the Ruby programming language.

  • SixtyFPS: Toolkit from Berlin for graphical UIs with Rust, C ++ and JavaScript [Ed: This article is an automate translation]

    The developers of SixtyFPS have released the toolkit for creating graphical user interfaces in version 0.1. According to the related blog entry, the release marks the transition from “lab mode”, i.e. the experimental laboratory mode, to the phase in which the toolkit can be used appropriately for development from the team’s point of view.

  • MySQL Filter Query Between Date Range

    MySQL is a popular and easy-to-use Database Management System that comes packaged with many features and flexibility to fit a wide range of use cases. One such feature is the MySQL date data type that is used to generate and store date values.

    In this guide, we will walk you through the MySQL date data type and show you how you can filter from a range of date.

  • Godot Engine - Agile input processing is here for smoother, more responsive gameplay

    Since it's not very usual I post here, let me remind you who I am. I'm Pedro, a.k.a. RandomShaper in the Godot community. I've been contributing to the engine since 2016, when I discovered it –version 2.1 was the newest– and decided to use it to create my game Hellrule. Precisely while testing this project on different models of Android phones, I found the need to make the improvements I'm explaining in this post.

    [...]

    However, depending on the demands of the game and the hardware it's running on at a given time, that may not be possible. If the device running the game is not powerful enough to keep everything at 60 FPS, the engine will run at a lower effective FPS rate. Rendering and idle processing will then occur less than 60 times per second, but the engine will do its best to have the gameplay-physics running at the target rate, by executing more than one of those physics steps per visible frame.

    If you look again at the game loop above, you'll understand that a consequence of the engine looping at a lower frequency is that, user input is also pumped and handled less frequently, which leads to having a lower responsiveness in addition to a less smooth update of the display.

  • C Switch Case Statements

    A switch statement—or simply a case statement—is a control flow mechanism that determines the execution of a program based on the value of a variable or an expression.

    Using a switch statement allows you to test multiple conditions and only execute a specific block if the condition is true. Although it works similarly to an if…else if….else statement, the syntax is simpler and easier to read and manage.

    This tutorial focuses on showing you how to create and work with switch statements in C programming.

  • Create and Use Array of Pointers in C

    Arrays and pointers are among the most fundamental data structures in the C language. They allow us to create flexible and easy-to-manage programs with only a few lines of code.

    Most of us are familiar with creating arrays with data types such as integers, characters, or floats. This guide will show you how to create an array of pointers and use it to store data.

  • Fgets Function in C

    The fgets function is defined in the C standard library (stdio.h) and used to read up to n characters from a specified stream such as standard input stream or file stream) to a string pointed with str.

    The C fgets function reads characters until it encounters an End-Of-File (EOF), a newline character, or when n-1 characters are read.

    This quick tutorial will discuss how to use the fgets function in C programs.

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.