Lightnews — Scholar-powered news

Dyalog @dyalog.bsky.social · 1d

#APLQuest 2013-03: Write a function that returns the number of words in the given character scalar or vector (see apl.quest/2013/3/ to test your solution and view ours). #APL #WordCount #TextProcessing

APL Quest 2013-3: What Is In a Word

Write a function which returns the number of words in the given character scalar or vector.

apl.quest

Dyalog @dyalog.bsky.social · 7d

DYNA Fall 2025 took place in New York City at the end of September. Our latest blog post – www.dyalog.com/blog/2025/10... – is our review of the presentations, workshops, and community building that took place. #dyna #dyalog #apl

DYNA Fall 2025 - Highlights and Reflections

Dyalog @dyalog.bsky.social · 8d

#APLQuest 2013-02: Write a function that returns the percent (from 0 to 100) of passing (65 or higher) grades in a vector of grades (see apl.quest/2013/2/ to test your solution and view ours). #APL #DataAnalysis #Percentages

APL Quest 2013-2: Making The Grade

Write a function which returns the percent (from 0 to 100) of passing (65 or higher) grades in a vector of grades.

apl.quest

2

Reposted by Dyalog

Nathaniel B 🦀 @nate-fe2o3.bsky.social · 16d

Busy solving Rust problems but now obsessed with APL. I guess time to implement APL primitives in Rust?

1 3

Dyalog @dyalog.bsky.social · 15d

Our #APLMonday series is changing! From this week, we will be posting questions from #APLQuest. This week's question is 2013-01: Write a function to produce a vector of the first n odd numbers (see apl.quest/2013/1/ to test your solution and view ours). #APL #OddNumbers #SequenceGeneration

APL Quest 2013-1: Seems a Bit Odd To Me

Write a function to produce a vector of the first n odd numbers.

apl.quest

1

Dyalog @dyalog.bsky.social · 19d

Glad to hear you enjoyed DYNA! Aaron loves questions so don't worry :) We really hope to see you again at another Dyalog event. A little bird told me the next one will be announced within a couple of weeks. Keep in touch Nathaniel!

Reposted by Dyalog

Nathaniel B 🦀 @nate-fe2o3.bsky.social · 19d

Finished up DYNA Fall 2025, had an absolute blast. The rabbit hole of array programming just goes deeper and deeper, but honestly I'd be disappointed if it didn't. Thanks to everyone who put up with my constant stream of questions (especially Aaron), and hope to see you all again soon.

2 1 1

Reposted by Dyalog

Nathaniel B 🦀 @nate-fe2o3.bsky.social · 19d

And a very special thanks to @codereport.bsky.social for introducing me to this paradigm in the first place. Not sure how many people end up in the ADSP -> ArrayCast -> Dyalog conference pipeline, but I highly recommend it
@dyalog.bsky.social #arrayprogramming #apl

1 1

Dyalog @dyalog.bsky.social · 20d

Our latest blog post is by the 2025 APL Forge winner, Borna Ahmadzadeh. His introduction to his efforts and prize-winning APLearn submission – www.dyalog.com/blog/2025/10... – are a tantalising preview of what we can expect from his Dyalog '26 presentation! #aplforge #apl #dyalog #programming

APLearn - The Winning APL Forge 2025 Project by Borna Ahmadzadeh

1 2

Dyalog @dyalog.bsky.social · 21d

Learn APL and compete for one of three $100 prizes! There's only one month left to enter the 2025.3 round of the APL Challenge. See challenge.dyalog.com for more information and to enter.

#aplchallenge #learnapl #apl

A free-to-enter competition that could change the way you think...and win you $100

challenge.dyalog.com

1

Reposted by Dyalog

Nathaniel B 🦀 @nate-fe2o3.bsky.social · 22d

Dyalog NA User Meeting starts tomorrow! Excited to meet everyone and learn about APL #APL #arraylang #NYC @dyalog.bsky.social

1 1

Dyalog @dyalog.bsky.social · 21d

DYNA Fall 2025 starts today! Morten Kromberg and other members of Team Dyalog will be joined by a capacity gathering of North American APLers in New York city for two days of presentations, workshops, and community building. Highlights and materials to follow!

#DYNA #APL #NewYork #TechConference

1

Dyalog @dyalog.bsky.social · 21d

This one is simple #APLMonday #APL

What does the following monadic array property function determine when given any array?

Dyalog @dyalog.bsky.social · 28d

Announcing the winner of the 2025 APL Forge – Borna Ahmadzadeh. Borna will present his winning work at Dyalog '26, but you can meet him before then at www.dyalog.com/news/164/420... #aplforge #apl #dyalog #programming

APL Forge 2025 Winner - Borna Ahmadzadeh

2

Dyalog @dyalog.bsky.social · 28d

All good answers to this one are valid. #APLMonday #Dyalog #APL

What does the following dyadic structural function compute when given vector arguments?
∘.{⍺⍵}

2

Dyalog @dyalog.bsky.social · Sep 19

Last chance to register for DYNA Fall 2025 (Sunday 21 September at 23:59 UTC). Register now at dyna.dyalog.com to secure your place to join us in New York city for two days of APL presentations, workshops, and community building (29-30 September 2025). #DYNS #APL #TechConference #NewYork

1 5

Dyalog @dyalog.bsky.social · Sep 17

Alex Holtzapple from METSIM will be presenting 'Lessons Learned when Converting from APL+Win to Dyalog APL'. One of 11 presentations on Day 1 of DYNA Fall 2025 in New York, 29 September. Free to attend. dyna.dyalog.com/presentation... #APL #TechConference #NewYork #LegacyCode

Lessons Learned when Converting from APL+Win to Dyalog APL - DYNA Fall 2025

METSIM® is the leading chemical and mineral processing plant simulation software used by engineers and operators around the globe. Since 1982, all development has taken place using APL+Win, which serv...

dyna.dyalog.com

3

Dyalog @dyalog.bsky.social · Sep 15

Pick your answer to this one carefully... #APLMonday #Dyalog #APL

What does the following dyadic selection function do when given an integer scalar as left argument and any vector as right argument? (⊃⌽)

1 1

Dyalog @dyalog.bsky.social · Sep 15

You have 1 week remaining to register for DYNA Fall 2025. Register now at dyna.dyalog.com to secure your place to join us in New York city for two days of APL presentations, workshops, and community building (29-30 September 2025). #DYNA #APL #TechConference #NewYork

Registration closes in 1 week for DYNA Fall 2025

3

Dyalog @dyalog.bsky.social · Sep 11

Data Analysis with ⎕CSV and ⌸. This workshop takes place on Day 2 of DYNA Fall 2025 in New York, 30 September. dyna.dyalog.com/workshops/da... #DYNA #APL #Workshop

Data Analysis with ⎕CSV and ⌸ - DYNA Fall 2025

The key operator ( ⌸ ) is used to perform GROUP BY-style aggregations in Dyalog. In this workshop we explore ways to import and pre-process data, looking at the fastest formats for data analysis in th...

dyna.dyalog.com

1

Dyalog @dyalog.bsky.social · Sep 10

DYNA Fall 2025 is taking place in New York city later this month. Read about the presentations that will be taking place at dyna.dyalog.com/presentations/ and don't forget to register by Sunday 21 September if you'd like to attend. #dyna #techconference #newyork

Presentations - DYNA Fall 2025

Presentations at DYNA Fall 2025 On Monday 29 September, join the Dyalog team and guests for a full day of talks exploring the latest developments in APL. Hear from developers, researchers, and users a...

dyna.dyalog.com

1

Dyalog @dyalog.bsky.social · Sep 9

We gave two presentations at the Programming Language Standardization and Specification (PLSS) 2025 conference in May. The video of Karta's presentation on APL Standards is now available www.youtube.com/watch?v=le9-...

#APL #programminglanguages

PLSS 2025: APL Standards by Karta Kooner

YouTube video by PLSS Workshop

www.youtube.com

Dyalog @dyalog.bsky.social · Sep 8

This one deserves a well-rounded answer... #APLMonday #Dyalog #APL

What does the following dyadic mathematical function do when given numeric arguments? {⍺×⌊0.5+⍵÷⍺}

Reposted by Dyalog

Nathaniel B 🦀 @nate-fe2o3.bsky.social · Sep 1

Great way to dive into array programming for the first time! Highly recommend both this and APL.quest for a solid intro to APL

1 2

Dyalog @dyalog.bsky.social · Sep 5

Meet Aaron Hsu, presenting on Day 1 of DYNA Fall 2025 in New York on 29 September. He’ll be one of 12 speakers sharing insights at this free-to-attend APL event. dyna.dyalog.com/speakers/aar...

#DYNA #APL #TechConference #NewYork

Aaron Hsu - DYNA Fall 2025

Aaron is an advocate for a terse and minimal array programming style and has a background in academic functional programming. After being introduced to APL while working on a GPU-hosted compiler, he s...

dyna.dyalog.com

1