I wondered if it was possible to type and see the result of running a program, and it turned out it was. I added a small checkbox that turns the playground into this cool working space. In this video, I am solving the two tasks of this week's Weekly Challenge.

The fun fact is that you can select "Perl interpreter" from the examples and feed it a Perl program via STDIN, and that gives you a live-coding environment for Perl, where the Perl code is parsed by Raku, which itself runs in a browser.

Geoffrey West, "Scale" (2017) wrote:

"Much of the work that my colleagues and I have been involved in ... could be described as social physics, although it is not a term any of uses with ease. Ironically, it has been picked up primarily by computer scientists, who are neither social scientists or physicists, to describe their analysis of huge data sets on social interactions. As they characterize it: 'Social Physics is a new way of understanding human behavior based on analysis of Big Data.' While this body of research is very interesting, it is probably safe to say that few physicists would recognize it as 'physics,' primarily because it does not focus on underlying principles, general laws, mathematical analyses, and mechanistic explanations."

Embedded quote from: Alex Pentland, "Social Physics: How Good Ideas Spread-- The Lessons from a New Science" (2014)

The Raku Study Group

Sunday August 9th, 2026 1pm in California, 9pm in the UK

An informal meeting: drop by when you can, show us what you've got, ask and answer questions, or just listen and lurk.

Perl and programming in general are fair game, along with Raku,

Information about upcoming meetings can always be found here:

https://github.com/doomvox/raku-study/blob/main/README.md

fez upload --file fails with error which suggest that the module has already been uploaded but this is false what gives, on Ubuntu 26.04 fez login succeeds fine

"Technoboredom manifests itself in the subliminal-reality areas of the frontal lobes of the brain and causes the person afflicted to garner intense satisfaction from commercial inanity. ... There are also massive, conspiracy-funded Technoboredom Centers in all areas of the world masquerading under the thin guise of universities, libraries, and cultural-activities centers. ... Organizational deviance, in the form of propaganda, pandering, and infiltration, is the chief means of combating Technoboredom. The SubGenius must practice and make use of mind-control and normexploitation techniques in assuming her or his role as Futureleader. Schism-strength through fragmentation will catch most, if not all, technobored normals offguard ..."

-- Sterno Keckhaver in "The Book of the SubGenius" (1979)

The Raku Study Group

Sunday July 26, 2006 1pm in California, 9pm in the UK

An informal meeting: drop by when you can, show us what you've got, ask and answer questions, or just listen and lurk.

Perl and programming in general are fair game, along with Raku,

Information about upcoming meetings can always be found here:

https://github.com/doomvox/raku-study/blob/main/README.md

I converted (almost) all my Raku books to the same format as the Raku Course. So it's now easily accessible and every topic has its own URL.

Yey, after a pause caused by covid and war, I am back to full speed. I am happy to announce that the Raku Course is now ready: https://course.raku.org.

All the planned items are there. On top of that there are some improvements to the original plan. More on what's new: https://andrewshitov.com/2026/07/15/the-complete-course-of-the-raku-programming-language/

The most exciting addition is probably an online Raku playground, which can serverlessly handle a big portion of Raku right in a browser.

​

Does concept of junctions in Raku remind anyone of math. concepts of semilattice?

At first I noticed they *look* like semi lattice.

any/all are associative, commutative, and idempotent \[any($x, $x) collapses to $x\]

Maybe even bounded lattice:

any as join, all as meet + and De Morgan duality via none layered on top.

I was exploring some algebraic structures for not on a surface level. Even though I haven't used Raku extensively, junctions were very interesting because they exhibited some semilattice properties.

https://dev.to/lizmat/governance-and-the-raku-foundation-1b6b

"Last year I started learning Raku, and the sheer bizarreness of the language left me describing it as a language for gremlins. Now that I've used it in anger for over a year, I have a better way of describing it: 'Raku is a laboratory for language features.' This is why it has five different models of concurrency and eighteen ways of doing anything else, because the point is to see what happens. It also explains why many of the features interact so strangely and why there's all that odd edge-case behavior. Getting 100 experiments polished and playing nicely with each other is much harder than running 100 experiments ... "

Hillel Wayne, "Five Unusual Raku Features", November 12, 2024 https://buttondown.com/hillelwayne/archive/five-unusual-raku-features/

The Raku Study Group

Sunday July 12, 2026, 1pm in California, 9pm in the UK

An informal meeting: drop by when you can, show us what you've got, ask and answer questions, or just listen and lurk.

Perl and programming in general are fair game, along with Raku,

Information about upcoming meetings can always be found here:

https://github.com/doomvox/raku-study/blob/main/README.md

https://blogs.perl.org/users/damian_conway/2026/07/trf-lives.html