Wim Vanderbauwhede continues their excellent blog series on algebraic data types with an extensive treatise on function types in not only Raku, but also Python, Rust and Haskell, with some C and Fortran thrown in for good measure (/r/rakulang, Twitter comments). Recommended if you would like to know more about functional programming and/or algebraic data types!

Continuing RFC investigations

Another collection of cool blog posts this week in honour of the 20th Anniversary of the Perl 6 RFC process:

• RFC 54, by Damian Conway: Operators: Polymorphic comparisons by p6steve (/r/rakulang comments).
• RFC 43: Integrate BigInts (and BigRats) Support Tightly With The Basic Scalars by John Longwalker (/r/rakulang comments).
• RFC22: Control flow: Builtin switch statement, by Damian Conway by Leon Timmermans.
• RFC 190, by Damian Conway: NEXT pseudoclass for method redispatch by Tobias Boege (/r/rakulang comments).
• RFC 307, by Simon Cozens by JJ Merelo.
• RFC 188, by Damian Conway: Objects: Private keys and methods by Alexander Kiryuhin (HackerNews comments).
• RFC 159, by Nathan Wiger: True Polymorphic Objects by Elizabeth Mattijsen

Looking forward to the final three!

Two this time

Wenzel P. P. Peppmeyer wrote two blog posts this week: Guarding Dynamics and Defined or dynvar. Andrew Shitov also wrote two blog posts in the Pearls of Raku series: Issue 5: the where clause and Issue 6: MAIN and BEGIN in addition to the blog posts for the Weekly Challenge.

Weekly Challenge

The entries for Challenge 73 that have Raku solutions:

• Weekly Challenge #73 by Luca Ferrari.
• Sliding Neighbour with Raku & Perl by Arne Sommer.
• Weekly Challenge #73 by Javier Luque.
• Weekly Challenge #73, Video Task #1, Task #2 by Mohammad S Anwar.
• Open the Window Just a Little Bit so Your Smallest Smaller Neighbour Can Get In by Colin Crain.
• Weekly Challenge #73 by Andrew Shitov.
• Min Sliding Window and Smallest Neighbor by Laurent Rosenfeld.
• Weekly Challenge #73 by Jaldhar H. Vyas.

Andrew Shitov reviewed all of the Raku solutions of Challenge #72. The Weekly Challenge #74 is up for your perusal!

Core Developments

• Nicholas Clark fixed a race condition in the garbage collection logic.
• Christian Bartolomäus implemented the nqp::execname op on the JVM backend, allowing for a lot of code simplification in Rakudo.

Questions about Raku

• How to access the attributes of a class indirectly by Richard Hainsworth.
• How to specify a github repo as the source of dependency of a module? by cowbaymoo.
• Art for stickers? by Ali.
• How to define protected methods? by cowbaymoo.
• Raku: effect of capture markers is lost “higher up” by mscha.
• Cannot install App::Mi6 by Mohammad S Anwar.

Meanwhile on Twitter

• Time lost in promise by Pradeep Pant |प्रदीप पंत.
• Gain three more by Andrew Shitov.
• They know nothing by Jonathan Cast.
• Twelve per week on average by Mohammad S Anwar.
• I remember vs by vass.
• A bit misleading? by Solomon Foster.
• Best support for multi-line strings by z̢͠a̡ļg͡o͏ b̷e̛҉çk̕͞ơ͢nş̛͞.
• VP a hater? by Salve J. Nilsen.
• Publishers without API by JJ Merelo.
• Recipes ready for pre-order by JJ Merelo.
• Splitting paths by Ramiro Encinas.
• Not to discuss by Klaus Stein.
• Don’t Wait! by Alexey Melezhik.
• A lot worse in practice by Tomasz Wegrzanowski.
• A little harder, please? by Mohammad S Anwar.
• August Sale! by JJ Merelo.
• Different languages by C言語完全に理解したん.
• Done in 4 languages by Mohammad S Anwar.
• My face? by Brian Wisti.
• 98 contributions by Mohammad S Anwar.
• What do you love about Raku? by Byron Alley.
• Towards a Weekly Challenge by Mohammad S Anwar.
• What if… by Vanderson M. Rosario 🇧🇷.

Meanwhile on perl6-users

• Combining multiple “is…” traits into one? by Stuart Hungerford.
• Place for examples in a Raku module? by Stuart Hungerford.
• Re-exporting modules that export operators… by Stuart Hungerford.

Comments about Raku

• Mind blown by artelius.
• Haven’t touched Raku by dreamwavedev.
• Raku-style regexes by s-ro_mojosa.
• Benchmarks by bobthecimmerian.
• On encapsulation by Ralph Mellor.
• Without a language by daniellionel.

New Raku Modules

• System::Stats::CPUsage by Ramiro Encinas.
• Mi6::Helper by Tom Browder.

Updated Raku Modules

• HTML::Canvas, LibXML by David Warring.
• Oddmuse6 by Alex Schroeder.
• PDF::Class by David Warring.
• JSON::Fast by Timo Paulssen.
• Sparrow6 by Alexey Melezhik.
• Gnome::GObject by Marcel Timmerman.
• Hash::Agnostic, Array::Agnostic by Elizabeth Mattijsen.

Winding down

Again a week with emphasis on blog posting and modules in the ecosystem! Yours truly keeps repeating: don’t forget to stay healthy and to stay safe. Let’s see how things are in the world of the Raku Programming Language next week!