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Programming Leftovers

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  • GNU Toolchain Begins Adding ARMv8.7-A Support

    The GNU compiler toolchain has begun landing Arm's contributions around ARMv8.7-A architecture support.

    While all of the ARMv8 cores to date remain with older versions of the architecture and even cases like ARMv8.2-A with the Cortex-A78 and X1, Arm continues working on new ARMv8 revisions and getting that software support in place well ahead of hardware availability.

  • Software correctness is a lot like flossing

    Which means that they’re not seeing the bigger picture. An explanation of why programmers “don’t care about correctness” shouldn’t just be post-hoc rationalizations. Here’s my main argument for why most programmers don’t seem to care about software correctness:

    Which is worse: buggy software or a root canal?

    How often do you floss?

    Whenever I pose this in a discussion, I get the same answer: everyone thinks root canals are worse, and at most half of the group flosses daily. That’s ridiculous! Flossing takes like three minutes a day. But people don’t do it because it’s fiddly, annoying, and inconvenient. If people are unwilling to do something simple to keep their teeth from rotting, why should we expect people to use annoying inconvenient tools to improve software?

  • Javascript Alert – Linux Hint

    Javascript is the most known language of the web. Javascript is widely used in front-end development as well as in the back-end. Javascript provides a lot of built-in functions to help in development. In this article, we are going to learn one of the javascript’s built-in alert() method, which is used to show pop-ups over the screen to either display a message or show a warning. The alert box is different from any other message or text on the screen. It is a pop-up that contains a message/text with an “OK” button. The user won’t be able to do any task while an alert box is over the screen, and he/she clicks the “OK” button. So, it is not recommended, if not needed. So, let’s have a look at what is an alert box and what are the different ways to use it.

  • Javascript Print Page – Linux Hint

    Javascript is a scripting or programming language, which is most commonly used nowadays in the web industry. It provides a lot of built-in objects, functions, and methods to perform several tasks. In this article, we are going to have a look at one of them which is used to print the web page. So, let us get started!

    You must have encountered some websites that provide a button to print the whole web page, or you must have felt the need to print a web page but there is no print button there. Javascript’s built-in object window provides us a method named print(). We can use window.print() function to fulfill this requirement.

  • Planned obsolescence | Playing Perl 6␛b6xA Raku

    Twelve years ago Larry planned the obsolescence of one of my modules. His cunning plan was executed by lizmat a fortnight ago. If you are building Rakudo from source you take another shortcut now.

  • Get Started With Django Part 3: Django View Authorization – Real Python

    In part 1 of this series, you learned the fundamentals of Django models and views. In part 2, you learned about user management. In this tutorial, you’ll see how to combine these concepts to do Django view authorization and restrict what users can see and do in your views based on their roles.

    Allowing users to log in to your website solves two problems: authentication and authorization. Authentication is the act of verifying a user’s identity, confirming they are who they say they are. Authorization is deciding whether a user is allowed to perform an action. The two concepts go hand in hand: if a page on your website is restricted to logged-in users, then users have to authenticate before they can be authorized to view the page.

    Django provides tools for both authentication and authorization. Django view authorization is typically done with decorators. This tutorial will show you how to use these view decorators to enforce authorized viewing of pages in your Django site.

  • PyCharm 2020.3 EAP #3

    The third build of PyCharm 2020.3 is now available in the Early Access Program with features and fixes for a smoother, more productive experience.

    We invite you to join our EAP to try out the latest features we have coming up, test that they work properly in your environments, and help us make a better PyCharm for everyone!

  • Change Tick Frequency in Matplotlib

    Matplotlib is one of the most widely used data visualization libraries in Python. Much of Matplotlib's popularity comes from its customization options - you can tweak just about any element from its hierarchy of objects.

    In this tutorial, we'll take a look at how to change the tick frequency in Matplotlib. We'll do this on the figure-level as well as the axis-level.

  • Python Software Foundation News: Key generation and signing ceremony for PyPI

    On Friday October 30th at 11:15 AM EDT the Python Software Foundation will be live streaming a remote key generation and signing ceremony to bootstrap The Update Framework for The Python Package Index. You can click here to see what time this is in your local timezone.

    This ceremony is one of the first practical steps in deploying The Update Framework to PyPI per PEP 458.

    The Python Software Foundation Director of Infrastructure, Ernest W. Durbin III, and Trail of Bits Senior Security Engineer, William Woodruff, will be executing the runbook developed at

    For transparency purposes a live stream will be hosted from the Python Software Foundation's YouTube channel. Please subscribe to the channel to be notified when the stream is live if you'd like to follow along.

  • Generating random avatar images in Django/Python -

    But most people don't have their mugshot on unfortunately. But you still want to display an avatar that is distinct per user. Your best option is to generate one and just use the user's name or email as a seed (so it's always random but always deterministic for the same user). And you can also supply a fallback image to Gravatar that they use if the email doesn't match any email they have. That's where this blog post comes in.

  • How to work with Files in Python | FOSS Linux

    In this tutorial, we see how to work with files in python, such as creating files, reading data from files, writing data to files, removing, and renaming files.

  • Lang team Backlog Bonanza and Project Proposals

    A month or two back, the lang team embarked on a new initiative that we call the "Backlog Bonanza". The idea is simple: we are holding a series of meetings in which we go through every pending RFC, one by one, and try to reach some sort of determination about what to do with it. Once we've finished that, we can start in on categorizing other forms of backlog, such as tracking issues.

  • Core team membership changes

    The core team has had a few membership updates in the last month, and we wanted to provide an update.

    To start, Florian Gilcher is joining the Core team as a full member. Florian has been attending meetings as an observer since March 2019. He is the lead of the Community Events team, and has done a lot of work in the open source world, with plenty of insight to offer especially as we look to form a Rust Foundation.

    There are also two folks stepping back from the team. Carol Nichols has been a member of the team for three years, and she is stepping back to make more time for other projects in the community, including and her continued work on the Rust book. Nick Cameron has recently welcomed a second child (congratulations!) and is leaving the core team to be able to focus more on his family and his work at PingCAP. He will continue to be around in the Rust community.

  • This Week in Rust 362

More in Tux Machines

Hands-On: Manjaro Linux on the Raspberry Pi 4

In my previous post, I walked through Installing Ubuntu Linux 20.10 on a Raspberry Pi 4. That went pretty well, with both the standard Gnome desktop and the MATE desktop. This time, because I am not much of an Ubuntu fan, I want to try a Linux distribution, which I prefer and have been using on my various laptop and desktop systems: Manjaro. Manjaro has had a Raspberry Pi distribution for quite a long time now – I first tried Manjaro-ARM on a Raspberry Pi 2 in early 2016. There was a bit of a scare when it looked like the Manjaro-ARM project would shut down in early 2017, but fortunately the project was saved by some dedicated community members. Read more

Today in Techrights

Android Leftovers

64-bit RISC-V core claims 10x better CoreMarks/Watt compared to other 3-5GHz CPUs

Micro Magic unveiled an up to 64-bit RISC-V core showing a groundbreaking 110,000 CoreMarks/Watt, with a 3GHz chip consuming less than 70mW. The company claims 10 times better CoreMarks/Watt compared to other processors in the 3-5GHz range. Considering the spectacular promise and sudden demise of AI tech firm Magic AI, we should perhaps be wary of hyped up companies with Magic in their name. Yet, the astonishing claims about an incredibly efficient RISC-V core coming out of Sunnyvale, Calif. based EDA firm Micro Magic in recent weeks appear to be for real. Read more