The Xen Project is excited to share that the Xen Hypervisor now runs
on Raspberry Pi. This is an exciting step for both hobbyists and
industries. Read more to learn about how Xen now runs on RPi and how
to get started.
Working with Rust is a set of examples that cover common programming
functions, tasks, and problems. It assumes a base programming
knowledge and looking for the proper syntax and solution written in
I use this resource primarily for myself, collecting up little
solutions as I go for reference later. Since I don’t use Rust
day-to-day, and new to it overall, a quick reference is quite useful
A golden rule in programming is that code does not do what you
expect it to do, but what you tell it to do. Bridging that gap can
sometimes be a quite difficult feat. In this lecture we are going to
cover useful techniques for dealing with buggy and resource hungry
code: debugging and profiling.
Finding out the time complexity of your code can help you develop
better programs that run faster. Some functions are easy to analyze,
but when you have loops, and recursion might get a little trickier
when you have recursion. After reading this post, you are able to
derive the time complexity of any code.
In general, you can determine the time complexity by analyzing the
program’s statements (go line by line). However, you have to be
mindful how are the statements arranged. Suppose they are inside a
loop or have function calls or even recursion. All these factors
affect the runtime of your code. Let’s see how to deal with these
I’m delighted to announce Swift Atomics, a new open source package
that enables direct use of low-level atomic operations in Swift
code. The goal of this library is to enable intrepid systems
programmers to start building synchronization constructs (such as
concurrent data structures) directly in Swift.
This month I interview Damian Conway, one of the Guardians of
Perl. Damian is computer scientist and excellent communicator—his
presentations and courses are widely popular around the world. He
was the Adjunct Associate Professor in the Faculty of Information
Technology at Melbourne’s Monash University between 2001 and 2010.
In the afternoon I signed up for Ahrefs Webmaster
Tools (AWT) which is free for website
owners. In the past I've used the free Backlink
Checker, also by Ahrefs, to
find new links to my blog. But because the checker shows only a subset
of backlinks it's very limited in use. So I was pleasantly surprised
that AWT shows all backlinks to Plurrrr. And
more, in a short time I was able to find a link still pointing to the
http version of this site (fixed). Moreover, I found a bug in my own
static site generator,
tumblelog: the first of
December 2019 falls in week 1 of 2020, but in the calendar view of
2019 the week number links to
2019, not 2020. This results in a missing page error, 404, which AWT
neatly reported. I plan to fix this issue the coming weekend.
When fonts fall
One of the typographical questions we get often is, “How does font
fallback work exactly?” It’s not even that Figma does something
unique here (although we have our own specific take), but font
fallback is just complex, filled with quirks and unexpected side
effects. Our resident font enthusiast Marcin
Wichary decided to dig into the issue
and prepare an exhaustive guide to font fallback, its beauty, and
all the pitfalls.
Comprehensive guide on handling long lines in Emacs
Users of Emacs sometimes run into a performance issue which they
didn't know about before, but is well known: Working with files
which include long lines. If the lines are long enough - which can
just be a couple thousand characters - Emacs will crawl to a halt
whilst utilising 100% CPU. After reading this guide, you will be
well prepared to tackle even these files in Emacs!
Let's install OpenBSD on a Lenovo Thinkpad X270. I used this
computer for my computer science studies. It has both Arch Linux and
Windows 10 installed as dual boot. Now that I'm no longer required
to run Windows, I can ditch the dual boot and install an operating
system of my choice.
is one of the three Web Components standards, rounded out by HTML
DOM provides a way to scope CSS styles to a specific DOM subtree and
isolate that subtree from the rest of the document. The <slot>
element gives us a way to control where the children of a Custom
Element should be inserted within its Shadow Tree. These features
combined enable a system for building self-contained, reusable
components that integrate seamlessly into existing applications just
like a built-in HTML element.
Git is a free and open source distributed Version Control System
(VCS). Git can be hard, especially for people discovering it for the
first time, but there are a lot of things that make this an
exceptional VCS worth learning. This post is not meant to be a git
tutorial, but rather a compilation of things and tips I find
interesting. I also wanted to give a perspective of git independent
of services like GitHub. Hopefully you can find something useful and
“git better at it” 🙃.
If you’re looking to learn how to use git, take a look at the Pro
Git book, it’s free and it is a
In the morning I finally finished Red
book 3 in the World of the First Law series by Joe Abercrombie. To
me the first third of the book was quite slow. Luckily the pace got
better after this and I finally could finish the book. Of the World
of the First Law series I consider Best Served
the best story; highly recommended. I didn't like The
much. Red Country is somewhat between those two, in my opinion, but
still a good read.
Rehousing two tarantulas
In the late afternoon I prepared two terrariums; plastic storage
boxes, and rehoused two tarantulas: a juvenile Chromatopelma
cyaneopubescens and a juvenile Pterinochilus murinus.
The latter escaped from the catch cup I used but I was well prepared
and did the rehousing in the bathroom. All went well, see Rehousing
Half Moon Bay
Clay Edison has his hands full. He’s got a new baby who won't
sleep. He’s working the graveyard shift. And he’s trying, for once,
to mind his own business. Then comes the first call. Workers
demolishing a local park have made a haunting discovery: the
decades-old skeleton of a child. But whose? And how did it get
No sooner has Clay begun to investigate than he receives a second
call—this one from a local businessman, wondering if the body could
belong to his sister. She went missing fifty years ago, the man
says. Or at least I think she did. It’s a little complicated.
And things only get stranger from there. Clay’s relentless search
for answers will unearth a history of violence and secrets,
revolution and betrayal. Because in this town, the past isn’t
dead. It’s very much alive. And it can be murderous.
In the evening I started in Half Moon
Clay Edison Book 3 by Jonathan Kellerman and Jesse Kellerman.