Ever used one of those fancy color palette generators? You know, the
ones where you pick a starting color, tweak some options that
probably include some musical jargon like "triad" or "major fourth",
and are then bestowed the five perfect color swatches you should use
to build your website?
This calculated and scientific approach to picking the perfect color
scheme is extremely seductive, but not very useful.
This is a CSS Reset for Flexbox and CSS Grid which helps you to
avoid issues in responsive layouts. It is one simple CSS rule which
I noticed in a UI framework. There aren’t any odd consequences and I
wish it was by default in all browsers.
The meaning of this statement may seem trivial. What we do here is
take the value of the name b and assign it to the name a, but do we
really? This is an ambiguous explanation that gives rise to a lot of
What does it mean for a name to be associated with a value? What is a value?
What does CPython do to assign a value to a name? To get the value?
Are all variables implemented in the same way?
Today we'll answer these questions and understand how variables, so
crucial aspect of a programming language, are implemented in
Podman is an excellent alternative to Docker
containers when you need increased security, unique identifier (UID)
separation using namespaces, and integration with systemd. In this
article, I use real-world examples to show you how to install
Podman, use its basic commands, and transition from the Docker
command-line interface (CLI) to Podman. You’ll also see how to run
an existing image with Podman and how to set up port forwarding.
In the Deep Learning (DL) age, more and more people have encountered
and used (knowingly or not) random matrices. Most of the time this
use is limited to the initialization of the networks weights, that
can be accomplished with a single line of code in your favorite DL
framework. However, Random Matrices have a rich mathematical theory
with far reaching applications in physics, network theory, machine
learning, finance, etc. This fascinating range of applications also
means that each field often developed its dedicated terminology to
describe the same mathematical concept, often with confusing
consequences. The aim of this article(s) is to introduce Random
Matrix Theory (RMT) from a physicist's perspective while trying to
relate different tools and terminology, especially across the math
and physics literature. Although you do need to know basic calculus,
I will try to introduce new concepts and give references in case you
would like to go deeper.
Since arrow functions were introduced in ES6, they have become
increasingly popular, changing the look and function of regular
I love arrow functions; I use them all the time. In fact, they have
grown so popular that you rarely see the function keyword anymore,
though I can assure you it is still used. I almost always use arrow
functions in place of the function keyword.
ZFS has become increasingly popular in recent years. ZFS on Linux
(ZoL) has pushed the envelope and exposed many newcomers to the ZFS
fold. iXsystems has adopted the newer codebase, now called
OpenZFS, into its codebase for TrueNAS CORE. The purpose of this
article is to help those of you who have heard about ZFS but have
not yet had the opportunity to research it.
Our hope is that we leave you with a better understanding of how and
why it works the way it does. Knowledge is key to the
decision-making process, and we feel that ZFS is something worth
considering for most organizations.
I am delighted to introduce a new open source project for the Swift
Server ecosystem, SwiftNIO
SSH. Distributed as a Swift
package, SwiftNIO SSH is designed to enable Swift developers to
interact with the SSH network protocol.
Recently I've been working on a few internal tools for my company,
Teclado. Things like web scrapers to collect data and store it in a
database, or simple tools to make people's jobs easier.
Because these are intended for a very small audience who are doing
very specific tasks, I normally make console applications. And
console applications can be tricky to use (and look hideous) most of
Rich is a Python library that changes that completely. My new
console apps are a joy to use, look great, and it's super easy to
In this post, let me tell you about Rich and how I've been using
it. I'm not a Rich expert by any means, but I hope it helps!
dilemma wherein the module has some private functions that have not
been exported. Testing a function that has been exported is easy
since it can be imported in the unit testing framework, and the
functionality can be tested. But how to unit-test a private
The bug was difficult to fix because the code was so complex. I
wasn’t really able to fix it until I simplified the code. Once the
code was simplified the bug was easy to fix. While doing this I
found an anti-pattern that I now call “One loop trying too hard”.
In the early evening I managed to remove the lid of the enclosure of
Adam's Acanthoscurria geniculata without disturbing the spider. The
juvenile female tarantula was resting on top of its burrow, so I took
several photos. She's very skittish and most of the time when I remove
the lid she hides from view immediately.
Security on the web matters. Whenever you connect to a web page and
enter a password, a credit card number, or other sensitive
information, you want to be sure that this information is kept
secure. Whether you are writing a personal email or reading a page
on a medical condition, you don’t want that information leaked to
eavesdroppers on the network who have no business prying into your
That’s why Mozilla is pleased to introduce HTTPS-Only Mode, a
brand-new security feature available in Firefox 83. When you enable
Firefox attempts to establish fully secure connections to every
Firefox asks for your permission before connecting to a website
that doesn’t support secure connections.
As you build out forms for the web, getting the semantics,
accessibility, and styling right is a lot of work. If you can get
all those right, you’re doing quite well for yourself. However,
there are still some thing we can do to make life better for the
folks filling out our forms.
In this article, we’ll look at some of the do’s and don’ts about
HTML form user experience (UX)
Bootstrap 5 is currently in its 3rd alpha release. The plan seems to
be to release Bootstrap 5 to the public as a final version near the
end of the year. In one of our recent projects we already went ahead
with using it, anticipating that the underlying logic wouldn’t
change that much from now until the release.
So let’s talk about some of the most important changes in Bootstrap
Since a few days, we’ve been able to get our hands on one of the
first Apple Silicon M1 devices: the new Mac mini 2020 edition. While
in our analysis article last week we had based our numbers on the
A14, this time around we’ve measured the real performance on the
actual new higher-power design. We haven’t had much time, but we’ll
be bringing you the key datapoints relevant to the new Apple Silicon
So, what does it mean to do one thing and do it well? Well, awk has
been a staple of any UNIX diet since the late 1970s. I think it's a
lovely little tool which I use even for rather mundane tasks. It's
certainly changed a bit over the years, but the core concept of the
language remains the same. Still, it's a complete programming
language and can do a lot more than a simple, single-purpose
The cut command is slightly newer, but like awk, it's a part of the
POSIX standard. It can also hardly be considered to have suffered
much feature creep: it's got a rather stringent set of parameters
and really does just one thing, which is cutting a smaller piece of
text out of a larger piece of text.
The question is of course, does the UNIX philosophy still hold up?
Is it always better to have one small program doing one thing well,
as opposed to a slightly bigger program doing many things? Let's
examine this by performing a simple task with two slightly different
Continuing on from our series last week, this time we’re going to
discuss the topic of term rewriting. Term rewriting is a very
general model of computation that consists of programmatic systems
for describes transformations (called rules) which transform
expressions called terms into other sets of terms.
If you are thinking about or never heard that building completely
serverless APIs was possible? This post is for you. I’m going to
compile a few lessons I’ve learned in the past 3-4 years while
shipping a few production projects and dealing with no servers at
Images define the world, each image has its own story, it contains a
lot of crucial information that can be useful in many ways. This
information can be obtained with the help of the technique known as
It is the core part of computer vision which plays a crucial role in
many real-world examples like robotics, self-driving cars, and
object detection. Image processing allows us to transform and
manipulate thousands of images at a time and extract useful insights
from them. It has a wide range of applications in almost every
Python is one of the widely used programming languages for this
purpose. Its amazing libraries and tools help in achieving the task
of image processing very efficiently.
Through this article, you will learn about classical algorithms,
techniques, and tools to process the image and get the desired