2021.46 Cro Once Again

The Cro Development team proudly announced version 0.8.7 of Cro, the set of Raku libraries for building reactive distributed systems, lovingly crafted to take advantage of all Raku has to offer. Sites such as raku.land and the IRC logs server beta run Cro in production. Check out all the fixes, improvements and new features such as async reverse proxying and improved warnings from rendering templates with undefined values.


Andrew Shitov has applied for a Raku DevRoom at FOSDEM 2022, which will be an online only event. Next week we should know whether it was accepted or not!

Generating a lot of frames

Andinus has written a blog post about Fornax (a collection of tools to visualize Path Finding Algorithms) called “Generating 4.8 million frames“, as part of a Computer Graphics Bachelor project.

Binary Regexes

Matthew ‘Stephen’ Stuckwisch was triggered by a question on StackOverflow, to revisit their ideas of what would be needed to allow regexes to be applied to binary data. Which resulted in quite a lot of useful links and discussion!

Grant Update

Daniel Sockwell has written two updates on the progress of the Persistent Data Structures Grant.

Data::Record’s Identity Crisis

Ben Davies is soliciting opinions about the future of the Data::Record module in: Annotations for the Complete Type.

That time of the year is coming closer!

Only a few weeks to go, and it’s Advent Calendar time again! Make sure you get a slot in this year’s Advent Calendar for the Raku Programming Language, by adding your blog post proposal to the preliminary list of authors and articles!


Weekly Challenge #139 is available for your perusal.

A new release manager, please

The Rakudo Team is still looking for someone willing and able to take on the role of the release manager of the upcoming MoarVM, NQP and Rakudo releases. You don’t have to be an ace programmer, or have intimate knowledge of the code base. The only thing you need is some time, and maybe some hardware to run tests, and be able to follow the Release Guide.

If you are interested in doing this responsible job, please make yourself known on the #raku-dev channel on Libera.chat. Your efforts will be greatly appreciated!

New Pull Requests

Core Developments

  • Daniel Green optimised memory usage in some bits of string handling, added JIT support for some not-so often used ops, made some ops inlinable and fixed a race condition in initial access to enums.
  • Jonathan Worthington simplified return from frame handling.
  • Stefan Seifert fixed a JITted return from a nested runloop, and fixed a race condition on initialization of dynamic variables.
  • Christian Bartolomäus fixed an issue with how invalid input is handled on the JVM backend.
  • Geoffrey Broadwell added support for Terminal::LineEditor in the REPL.
  • Daniel Sockwell improved the consistency of handling attempts to (re-)bind to read-only variables.
  • Vadim Belman added the possibility to the .^mro method to request parametric or concrete roles to be included in the result.
  • Timo Paulssen optimized smartmatching on Int, thus speeding up smartmatching on enums with integer values.
  • Patrick Böker added checksums for release files.
  • And some other smaller tweaks and fixes.

Questions about Raku

Meanwhile on Twitter

Meanwhile on the mailing list

Comments about Raku

New Raku modules

  • has-word “A quick non-regex word-boundary checker” by Elizabeth Mattijsen.

Updated Raku Modules

Winding down

A little bit of a quiet week, it feels, with only a single new module. But still nice to see that at least 13 people have released updated modules, one of them the new version of Cro! And again a thought provoking discussion this week. Check again next week for more Rakudo news. And it can’t be said enough: stay healthy and stay safe. See you then!

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