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Programming Leftovers

Submitted by Roy Schestowitz on Tuesday 26th of July 2022 06:40:01 AM Filed under
Development
  • Commit Messages Don’t Matter

    The process of writing "good" commit messages is sacrosanct to some developers. A quick search will pop up dozens of articles on "How to Write Good Commit Messages." Proper style? Formatting. Imperative voice. Capitalization. Hard wraps.

  • An Introduction to Go Scheduler | Developer.com

    In Go and Golang programming, a scheduler is responsible for distributing jobs in a multiprocessing environment. When the available resources are limited, it is the task of the scheduler to manage the work that needs to be done in the most efficient way. In Go, the scheduler is responsible for scheduling goroutines, which is particularly useful in concurrency. Goroutines are like OS threads, but they are much lighter weight. However, goroutines always take the help of the underlying OS thread model and the scheduler it works on is at a much higher level than the OS scheduler. This Go programming tutorial provides a quick look at the concepts behind the Go scheduler.

  • Four workers arrive at a construction site ...

    Four workers arrive at a construction site to help. They each take a shovel and are eager to start shoveling. But what is that? They notice some dents and some dried cement on the shovels. So what now?

    [...]

    Meanwhile the last worker is busy waving around the shovel and complaining to everyone about the broken tools they have to use. This worker constantly demands a new shovel even though another worker made it clear that there would be no newer shovels any time soon and that nothing could change that. At the end of the day the efficiency of this approach lies at -160%. Not only was no work done by this worker because of all the waving and complaining. Furthermore, the constant complaining kept several other people busy who would have been able to do some work otherwise.

    Dear contributors, please don't be Worker 4.

  • What is Wrong with the Linux Community

    It’s pretty simple: if you’re not satisfied, switch to something you like, or even create something and share it with the community.

  • How to Perform Intersect() Operations in R

    There is a requirement to return only the common values from R data structures like vector, list, and dataframe.
    In this article, we will discuss how to perform the intersect() operations in vector, list and dataframe.

  • Remove NA in R

    “When a production sensor fails, you’ll only be able to collect accurate measurements on four of the assembly line’s six measurement points. However, one of the quality sheet’s marks is illegible. You may be without samples for a whole shift. Therefore, this may influence your statistical computations. Missing data is not handled gracefully by several processes. In this article, we’ll look at a few different techniques to get rid of NA values in R. This permits you to restrict your computations to R data frame rows that meet a specific level of completion.

  • R – Reorder the Columns in the Data Frame

    Consider a requirement that you need to reorder the columns in an R data frame. How can you do that? Go through this article to get the solution for the given requirement.

  • R – Extract Columns From Data Frame

    One day, Person X asked Person Y, “How do you get the values present in the data frame column in R language?” So, Person Y answered, “There are many ways to extract columns from the data frame.” So, he requested Person X to check this tutorial.

    There are many ways to extract columns from the data frame. In this article, we will discuss two scenarios with their corresponding methods.

  • Scatterplot in R

    “Visual representations of data include graphs and charts. Your goal as a data scientist is to make perfect sense of vast amounts of information. Three procedures are involved in data analysis. Obtaining Data, cleaning, and altering the data is an important part of the process. To further evaluate the data, construct a visual display from it. Data visualizations with the plot are tremendous tools for making complicated analysis easier to understand. But first, let’s go through some fundamental plotting principles like scatter plots. A scatterplot is a diagram that presents the levels of two numerical variables in a set of data as geometrical points within a Cartesian diagram.”

  • PyTorch – count_nonzero()
  • PyTorch – column_stack()
  • PyTorch – cat()
  • PyTorch – argmin()
  • Dictionary Comprehension Python
  • Perform Inverse Trigonometric Functions in PyTorch
  • PyTorch – deg2rad()
  • PyTorch – cumsum()
  • Return Top & Last Rows From PySpark Pandas DataFrame

    “In Python, PySpark is a Spark module used to provide a similar kind of Processing like spark using DataFrame, which will store the given data in row and column format.
    PySpark – pandas DataFrame represents the pandas DataFrame, but it holds the PySpark DataFrame internally.

    Pandas support DataFrame data structure, and pandas are imported from the pyspark module.

    Before that, you have to install the pyspark module.”

  • Perl Weekly Challenge 174: Disarium Numbers in dc
»

More in Tux Machines

today's howtos

  • How to Change Comment Color in Vim – Fix Unreadable Blue Color

    Are you annoyed about the comment color in vim? The dark blue color of the comment is often hard to read. In this tutorial, we learn how to change the comment color in Vim. There are few methods we can use to look vim comment very readable.

  • How to Add Repository to Debian

    APT checks the health of all the packages, and dependencies of the package before installing it. APT fetches packages from one or more repositories. A repository (package source) is basically a network server. The term "package" refers to an individual file with a .deb extension that contains either all or part of an application. The normal installation comes with default repositories configured, but these contain only a few packages out of an ocean of free software available. In this tutorial, we learn how to add the package repository to Debian.

  • Making a Video of a Single Window

    I recently wanted to send someone a video of a program doing some interesting things in a single X11 window. Recording the whole desktop is easy (some readers may remember my post on Aeschylus which does just that) but it will include irrelevant (and possibly unwanted) parts of the screen, leading to unnecessarily large files. I couldn't immediately find a tool which did what I wanted on OpenBSD [1] but through a combination of xwininfo, FFmpeg, and hk I was able to put together exactly what I needed in short order. Even better, I was able to easily post-process the video to shrink its file size, speed it up, and contort it to the dimension requirements of various platforms. Here's a video straight out of the little script I put together: [...]

  • Things You Can And Can’t Do

    And it got me thinking about what you can and can’t do — what you do and don’t have control over.

  • allow-new-zones in BIND 9.16 on CentOS 8 Stream under SELinux

    We run these training systems with SELinux enabled (I wouldn’t, but my colleague likes it :-), and that’s the reason I aborted the lab: I couldn’t tell students how to solve the cause other than by disabling SELinux entirely, but there wasn’t enough time for that.

  • Will the IndieWeb Ever Become Mainstream?

    This is an interesting question, thanks for asking it, Jeremy. I do have some history with the IndieWeb, and some opinions, so let’s dive in.

    The short answer to the question is a resounding no, and it all boils down to the fact that the IndieWeb is really complicated to implement, so it will only ever appeal to developers.

  • How to Install CUPS Print Server on Ubuntu 22.04

    If your business has multiple personal computers in the network which need to print, then we need a device called a print server. Print server act intermediate between PC and printers which accept print jobs from PC and send them to respective printers. CUPS is the primary mechanism in the Unix-like operating system for printing and print services. It can allow a computer to act as a Print server. In this tutorial, we learn how to set up CUPS print server on Ubuntu 22.04.

Open Hardware: XON/XOFF and Raspberry Pi Pico

  • From XON/XOFF to Forward Incremental Search

    In the olden days of computing, software flow control with control codes XON and XOFF was a necessary feature that dumb terminals needed to support. When a terminal received more data than it could display, there needed to be a way for the terminal to tell the remote host to pause sending more data. The control code 19 was chosen for this. The control code 17 was chosen to tell the remote host to resume transmission of data.

  • Raspberry Pi Pico Used in Plug and Play System Monitor | Tom's Hardware

    Dmytro Panin is at it again, creating a teeny system monitor for his MacBook from scratch with help from our favorite microcontroller, the Raspberry Pi Pico. This plug-and-play system monitor (opens in new tab) lets him keep a close eye on resource usage without having to close any windows or launch any third-party programs. The device is Pico-powered and plugs right into the MacBook to function. It has a display screen that showcases a custom GUI featuring four bar graphs that update in real-time to show the performance of different components, including the CPU, GPU, memory, and SSD usage. It makes it possible to see how hard your PC is running at a glance.

Security Leftovers

How to Apply Accent Colour in Ubuntu Desktop

A step-by-step tutorial on how to apply accent colour in Ubuntu desktop (GNOME) with tips for Kubuntu and others. Read more

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