Tacit Talk

In this episode, "Representation-Driven Dispatch" (generated by Claude 4.6 Opus) is read by the Speechify text-to-speech app.SocialsTacit Talk YouTube PlaylistConor Hoekstra: LinkTree / BioShow NotesDate Released: 2026-04-15Representation-Driven Dispatch

In this episode, Conor interviews Madeline Vergani about TinyAPL 0.13, inverses, AP8L and more!SocialsTacit Talk YouTube PlaylistConor Hoekstra: LinkTree / BioAbout the GuestMadeline Vergani is the creator of TinyAPL, the Omnibar and AP8L.Show NotesDate Recorded: 2026-03-30Date Released: 2026-03-31Madeline Vergani on APL WikiTinyAPLTinyAPL on APL WikiTinyAPL InverseOmnibarTinyAPL CombinatorsArrayCast Episode 88: Madeline Vergani and tinyaplTacit Talk Episode 14: TinyAPL with Madeline VerganiMadeline's BlogMost recent blog postAP8L

In this episode, the 1972 paper "Algebra as a Language" by Kenneth E. Iverson is read by the Speechify text-to-speech app.SocialsTacit Talk YouTube PlaylistConor Hoekstra: LinkTree / BioShow NotesDate Released: 2026-03-28Algebra as a Language (1972)Algebra: An Algorithmic Treatment (1972)

In this episode, the "From List Calculus to Array Calculi" (generated by GPT 5.4) is read by the Speechify text-to-speech app.SocialsTacit Talk YouTube PlaylistConor Hoekstra: LinkTree / BioShow NotesDate Released: 2026-03-18From List Calculus to Array CalculiAn Introduction to the Theory of Lists (1986)Mathematics of Arrays (MoA)The Algebra of Programming (1996)Algegraic Identities for Program Calculation (1989)Algorithm Design with Haskell (2020)Bird-Meertens Formalism (BMF)The School of Squiggol: A History of BMF (2019)Single Assignment C (SaC)Lectures on Constructive Functional Programming

In this episode, the "Richard Bird's Algebraic Laws for Program Calculation" which is a summary of the important papers that introduced the algebraic laws of programming (generated by Claude 4.6 Opus) is read by the Speechify text-to-speech app.SocialsTacit Talk YouTube PlaylistConor Hoekstra: LinkTree / BioShow NotesDate Released: 2026-03-14Richard Bird's Algebraic Laws for Program CalculationAn Introduction to the Theory of Lists (1986)The Algebra of Programming (1996)Algegraic Identities for Program Calculation (1989)Tweet about Kadane's Algorithm (2021/2022)Algorithm Design with Haskell (2020)Bird-Meertens Formalism (BMF)The School of Squiggol: A History of BMF (2019)

In this episode, the 1979 Turing Award paper "Notation as a Tool of Thought" by Kenneth E. Iverson is read by the Speechify text-to-speech app.SocialsTacit Talk YouTube PlaylistConor Hoekstra: LinkTree / BioShow NotesDate Released: 2026-03-02Notation as a Tool of Thought (1979)

In this episode, Conor chats with Adám Brudzewsky about Dyalog 20.0, array notation, namespaces and the behind operator.SocialsTacit Talk YouTube PlaylistConor Hoekstra: LinkTree / BioAbout the GuestAdám Brudzewsky is the head of language design at Dyalog Ltd. He is a lifelong APL programmer, founder of the APL Orchard, and the creator of Extended Dyalog APL and APLcart.Show NotesDate Recorded: 2026-01-01Date Released: 2026-01-02DyalogDyalog 20.0TryAPLBehind is HereUsing the Behind Operator in Dyalog APL // APL Programming // NEW in Dyalog v20.0ArrayCast PodcastDyalog User Meeting YouTube ChannelDyalog Ltd YouTube ChannelDyalog 20.0 Top 5 FeaturesAPL QuestAPL ChallengeWorking with Array Notation in Dyalog APL // APL Programming // NEW in Dyalog v20.0Inline Tracing in Dyalog // APL Programming // NEW in Dyalog v20.0Using the Behind Operator in Dyalog APL // APL Programming // NEW in Dyalog v20.0Running External Programs with ⎕SHELL // APL Programming // NEW in Dyalog v20.0Namespace Manipulation and Data Extraction // APL Programming // NEW in Dyalog v20.0The Beauty of Algorithms (code_report YouTube Video)TinyAPL Extra ArgumentsAPL Session from RecordingKap ForksJ Train TableElimination Sort (APL Quest 2023-1)What’s Your Sign? (APL Quest 2018-4)

In this episode, Conor chats with Max Sun about his path to becoming an APL-er.SocialsTacit Talk YouTube PlaylistConor Hoekstra: Twitter | BlueSky | MastodonAbout the GuestsMax Sun is Senior APL Developer at InvestCloud, Inc. and was previously an APL developer at BCA Research. His interests include array programming, functional programming and programming languages and paradigms.Show NotesDate Recorded: 2025-10-05Date Released: 2025-12-29Tacit Talk Episode 28: Co-dfns & AI with Aaron HsuArrayCast Episode 22: Josh David, APL in IndustryBCA ResearchCTFP VideosAPL Open Jobs

In this episode, Conor chats with Aaron Hsu live from Minnowbrook 2025 about Co-dfns, fonts, AI and more!SocialsTacit Talk YouTube PlaylistConor Hoekstra: Twitter | BlueSky | MastodonAbout the GuestsAaron Hsu is the implementor of Co-dfns and an advocate for a terse and minimal array programming style. Hsu has a background in academic functional programming, and was primarily a Scheme programmer for ten years before learning APL. He was introduced to APL by Morten Kromberg while working on a GPU-hosted compiler, and switched to Dyalog APL for the project, which is now Co-dfns.Show NotesDate Recorded: 2025-10-04Date Released: 2025-10-22ADSP Episode 197: 🇬🇧 Algorithms & Tersity with Aaron HsuADSPArrayCastADSP Episode 111: C++23 Ranges, 2022 Retro & Star WarsAPL FontsPragmata Pro FontStanley JordanCo-dfnsCo-dfns 4.1.4Co-dfns TweetArrayFireDyalogScriptLearning APLArrayCast Episode 114: Gary Bergquist and Zark Utilities

In this episode, Conor moderates a discussion between Aaron Hsu and Jon Smith about tersity.SocialsTacit Talk YouTube PlaylistConor Hoekstra: Twitter | BlueSky | MastodonAbout the GuestsAaron Hsu is the implementor of Co-dfns and an advocate for a terse and minimal array programming style. Hsu has a background in academic functional programming, and was primarily a Scheme programmer for ten years before learning APL. He was introduced to APL by Morten Kromberg while working on a GPU-hosted compiler, and switched to Dyalog APL for the project, which is now Co-dfns.Jon Smith is a senior software engineer and security researcher with a focus on compilers, reverse engineering, and low-level systems development. His expertise spans multiple architectures and operating systems, with a particular emphasis on LLVM internals, static analysis tooling, and custom native code generation, including everything from shellcode and bootloaders to bespoke object file layouts. He has written custom compiler optimizations, firmware for embedded systems, and tooling for both offensive and defensive security applications. With a strong background in C, C++, and assembly, he often works at the intersection of language tooling and binary analysis, applying deep systems knowledge to practical engineering problems. He also maintains a public Twitch stream aimed at making vulnerability research accessible to newcomers without a formal computer science background.Show NotesDate Recorded: 2025-03-24Date Released: 2025-03-28GitHub Discussion of ADSP Episode 197: 🇬🇧 Algorithms & Tersity with Aaron HsuADSP Episode 197: 🇬🇧 Algorithms & Tersity with Aaron HsuCo-dfnsConway's LawBill Gate's "An Open Letter to Hobbyists"

In this episode, the discussion on GitHub between Aaron and Jon from the ADSP Episode 197 is read by the Speechify text-to-speech app.SocialsTacit Talk YouTube PlaylistConor Hoekstra: Twitter | BlueSky | MastodonShow NotesDate Released: 2025-03-19GitHub Discussion of ADSP Episode 197: 🇬🇧 Algorithms & Tersity with Aaron HsuADSP Episode 197: 🇬🇧 Algorithms & Tersity with Aaron HsuAI Won't Fix the Fundamental Flaw of ProgrammingHow an APL Prototype Helped Designing a Service // Martin Janiczek // APL Seeds '21Link to Github DiscussionSpeechify (save $60 by using this link)

In this episode, the article "In Praise of APL: A Language for Lyrical Programming" by Alan J. Perlis published in 1977 is read by the Speechify text-to-speech app.SocialsTacit Talk YouTube PlaylistConor Hoekstra: Twitter | BlueSky | MastodonShow NotesDate Released: 2025-03-15In Praise of APL: A Language for Lyrical Programming (1977)Link to Github DiscussionSpeechify (save $60 by using this link)

In this episode, the article "Almost Perfect Artifacts Improve only in Small Ways: APL is More French than English" by Alan J. Perlis published in 1978 is read by the Speechify text-to-speech app.SocialsTacit Talk YouTube PlaylistConor Hoekstra: Twitter | BlueSky | MastodonShow NotesDate Released: 2025-03-11Almost Perfect Artifacts Improve only in Small Ways: APL is More French than English (1978)Link to Github DiscussionSpeechify (save $60 by using this link)

In this episode, The Inductive Method of Introducing APL by Kenneth E. Iverson is read by the Speechify text-to-speech app.SocialsTacit Talk YouTube PlaylistConor Hoekstra: Twitter | BlueSky | MastodonShow NotesDate Released: 2025-03-10The Inductive Method of Introducing APL (1980)Link to Github DiscussionSpeechify (save $60 by using this link)

In this episode, the introduction to the book A Source Book in APL (1981) by Eugene McDonnell is read by the Speechify text-to-speech app.SocialsTacit Talk YouTube PlaylistConor Hoekstra: Twitter | BlueSky | MastodonShow NotesDate Released: 2025-03-08A Source Book in APL (1981)A Source Book in APL - Introduction (1981)Speechify (save $60 by using this link)

In this episode, the article Kenneth E. Iverson - An Autobiographical Essay (2008) by Ken Iverson and with Donald McIntyre is read by the Speechify text-to-speech app.SocialsTacit Talk YouTube PlaylistConor Hoekstra: Twitter | BlueSky | MastodonShow NotesDate Released: 2025-03-05Kenneth E. Iverson (2008)Kenneth E. Iverson - An Autobiographical Essay (Vector Vol 23, No 4 - 2008)Speechify (save $60 by using this link)

In this episode, the collection of quotations and anecdotes by Ken Iverson and friends, originally compiled and editted by Roger Hui in 2005 but last updated in 2021 is read by the Speechify text-to-speech app.SocialsTacit Talk YouTube PlaylistConor Hoekstra: Twitter | BlueSky | MastodonShow NotesDate Released: 2025-03-02Ken Iverson Quotations and Anecdotes (2005)Speechify (save $60 by using this link)

In this episode, Conor interviews Kai Schmidt, creator of the Uiua language.SocialsTacit Talk YouTube PlaylistConor Hoekstra: Twitter | BlueSky | MastodonAbout the GuestKai Schmidt is a Rust developer, language enthusiast and the creator of the Uiua programming language, a general purpose, stack-based, array-oriented programming language.Show NotesDate Recorded: 2025-02-21Date Released: 2025-02-22UiuaUiua Pad

In this episode, the paper The Design of APL (1973) is read by the Speechify text-to-speech app.SocialsTacit Talk YouTube PlaylistConor Hoekstra: Twitter | BlueSky | MastodonShow NotesDate Released: 2025-02-11The Design of APL (1973)Speechify (save $60 by using this link)

In this episode, the paper The Evolution of APL (1978) presented at the first HOPL conference is read by the Speechify text-to-speech app.SocialsTacit Talk YouTube PlaylistConor Hoekstra: Twitter | BlueSky | MastodonShow NotesDate Released: 2025-02-08The Evolution of APL (1978) - on JSoftwareThe Evolution of APL (1978) - on ACM Digital LibrarySpeechify (save $60 by using this link)

In this episode, the Array Theory and the Design of Nial (2013) text is read by the Speechify text-to-speech app.SocialsTacit Talk YouTube PlaylistConor Hoekstra: Twitter | BlueSky | MastodonShow NotesDate Released: 2025-02-05Array Theory and the Design of Nial (2013)Speechify (save $60 by using this link)

In this episode, the Array Theory and the Design of Nial (2013) text is discussed.SocialsTacit Talk YouTube PlaylistConor Hoekstra: Twitter | BlueSky | MastodonShow NotesDate Released: 2025-01-29Array Theory and the Design of Nial (2013)NotebookLM

In this episode, Conor interviews Madeline Vergani about TinyAPL, Omnibar, Strawberry and more!SocialsTacit Talk YouTube PlaylistConor Hoekstra: Twitter | BlueSky | MastodonAbout the GuestMadeline Vergani is the creator of TinyAPL and the Omnibar.Show NotesDate Recorded: 2025-01-25Date Released: 2025-01-26TinyAPLOmnibarTinyAPL CombinatorsArrayCast Episode 88: Madeline Vergani and tinyaplhttps://github.com/codereport/array-language-comparisonsMadeline's BlogTinyAPL TrainsBQN - What is a primitive?Nial AtlasesStrawberry

In this episode, the Collection-Oriented Languages (1990) paper is discussed.SocialsTacit Talk YouTube PlaylistConor Hoekstra: Twitter | BlueSky | MastodonShow NotesDate Released: 2025-01-09Collection-Oriented Languages (1990)NotebookLM

In this episode, the 1979 ETI article APL: Good for the Brain (1979) is discussed.SocialsTacit Talk YouTube PlaylistConor Hoekstra: Twitter | BlueSky | MastodonShow NotesDate Released: 2025-01-06APL: Good for the Brain (1979)NotebookLM

In this episode, Conor interviews dzaima about APL, BQN, Advent of Code and more!SocialsTacit Talk YouTube PlaylistConor Hoekstra (Twitter)Conor Hoekstra (GitHub)Conor Hoekstra (Mastodon)About the Guestdzaima is author of dzaima/APL, dzaima/BQN, CBQN, dzaima/paste and more!Show NotesDate Recorded: 2024-12-20Date Released: 2024-12-21BQN LanguageCBQNdzaima/APLdzaima/BQNdzaima/pastedzaima YouTube Channeldzaima/SOGLdzaima/CanvasKap LanguageBQN ⌾ (Under) ModifierBQN Comp.javabqn.jsOther BQN ImplementationsBQN Implementation ComponentsBQN compiler (c.bqn)BQN r0.bqnBQN r1.bqnSingeliAdvent of Code Day 12AoC Day 12 BQN Dzaima’s SolutionLinux perf ToolCBQN )time functionCBQN )profile functiondzaima/grrdetegr/bqnlsp

In this episode, the 1991 paper A Personal View of APL is discussed.SocialsTacit Talk YouTube PlaylistConor Hoekstra (Twitter)Conor Hoekstra (GitHub)Show NotesDate Released: 2024-12-10A Personal View of APL (1991)NotebookLM

In this episode, the 1989 Phrasal Forms paper is discussed.SocialsTacit Talk YouTube PlaylistConor Hoekstra (Twitter)Conor Hoekstra (GitHub)Show NotesDate Released: 2024-12-05Phrasal Forms - JSoftware (1989)Phrasal Forms - PDF (1989)NotebookLM

In this episode, the 1991 Tacit Definition paper is discussed.SocialsTacit Talk YouTube PlaylistConor Hoekstra (Twitter)Conor Hoekstra (GitHub)Show NotesDate Released: 2024-11-28Tacit Definition (1991)NotebookLM

In this episode, Conor interviews Mitchell Kember about the state of tooling in BQN.SocialsTacit Talk YouTube PlaylistConor Hoekstra (Twitter)Conor Hoekstra (GitHub)About the GuestMitchell Kember is a programming language enthusiast who enjoys working on compilers and developer tools. He maintains the BQN extension for VS Code.Show NotesDate Recorded: 2024-11-23Date Released: 2024-11-24BQN Tooling:BQN VS Code ExtensionBQN VS Code Extension (GitHub)BQN VS Code Extension - Create an Issuebqn-testbqn-lintOther Links:Fushia (OS)FIDL (Fuchsia Interface Definition Language)J NuvocAdvent of CodeZig LanguageBQN LanguageUiua LanguageBQNPADUniversity of WaterlooAWKLuaPandocTree-sitterBlack (Python)pytestC++26 ReflectionJelly LanguageArrayCast Episode 83: Jelly, Code Golf and a Sad GoodbyeRoc LanguageSoftware You Can Love ConferenceSoftware You Can Love Blog PostDefeating the Optimizer: How to Write (and avoid) Unoptimizable Code - Martin WickhamData-Oriented Design Revisited: Type Safety in the Zig Compiler - Matthew LuggCppCon 2014: Mike Acton “Data-Oriented Design and C++”NotebookLMProblems with BQNSoftware Unscripted PodcastDeveloper Voices PodcastCoRecursive Podcast

In this episode, Conor moderates the first “Implementer Panel” with Marshall Lochbaum (BQN), Adám Brudzewsky (Dyalog APL), Elias Mårtenson (Kap) and Kai Schmidt (Uiua).SocialsTacit Talk YouTube PlaylistConor Hoekstra (Twitter)Conor Hoekstra (GitHub)Show NotesDate Recorded: 2024-10-22Date Released: 2024-10-23Dyalog APLBQNKapUiuaCBQNSingeliDyalog APL ⎕DTWhat is a primitive? (in BQN)BQN CrateMarshalls bqn-libsDyalog APL ⎕RArithmetic progression vectorUiua TypesMandelbrot in KapUiua Under ⍜BQN Under ⌾Kap Under ⍢Lambda World 2024 - The Power of Function Composition - Conor HoekstraKap Dice Rolls ExampleCool Code:BQN /⁼BQN /↕Dyalog APL ⍸⍳Kap ⍸⍳Dyalog APL ⊥⍨Uiua °▽ (Run Length Encode)Uiua GifBQN +⌜´Kap ∥ (Parallel Operator)

In this episode, Conor interviews Zach Smith about Combinatory Programming.SocialsTacit Talk YouTube PlaylistConor Hoekstra (Twitter)Conor Hoekstra (GitHub)About the GuestZach Smith is a Brooklyn-based writer and computer programmer. His independent research tends to focus on novel intersections between computer programs and the liberal arts.Show NotesDate Recorded: 2024-09-27Date Released: 2024-09-28Combinatory ProgrammingThe Recurse CenterLearn You A Haskell for Great Good!“Point-Free or Die: Tacit Programming in Haskell and Beyond” by Amar ShahJanetAPCL (A Practical Combinator Library)apcl-jsapcl-janetapcl-erlapcl-exHistory of Mathematical NotationArrayCast Episode 84: Tacit #6zdsmith.com

In this episode, Conor interviews Adám Brudzewsky, head of language design at Dyalog Ltd.SocialsTacit Talk YouTube PlaylistConor Hoekstra (Twitter)Conor Hoekstra (GitHub)About the GuestAdám Brudzewsky is the head of language design at Dyalog Ltd. He is a lifelong APL programmer, founder of the APL Orchard, and the creator of Extended Dyalog APL and APLcart.Show NotesDate Recorded: 2024-08-09Date Released: 2024-08-11www.dyalog.comTryAPLArrayCast PodcastDyalog User Meeting YouTube ChannelDyalog Ltd YouTube ChannelMastering Dyalog APL by Bernard LegrandLearning APL by Stefan KrugerProgramming in APL by Ray PolivkaTacit Workshop Link (Tacit Techniques)Combinator Table TweetDyalog Help - Operator SyntaxWithe GlyphThe Power of Function Composition - Conor Hoekstra | Craft Conference 2024Having Fun with Point Free Programming in APLJ Modifier TrainsChess Problem / SolutionTinyAPLTinyAPL CombinatorsDyalog RIDE

In this episode, Conor interviews Elias Mårtenson, creator of the Kap programming language.SocialsTacit Talk YouTube PlaylistConor Hoekstra (Twitter)Conor Hoekstra (GitHub)About the GuestElias Mårtenson is the creator or the Kap programming language.Show NotesDate Recorded: 2024-07-12Date Released: 2024-07-13Array Cast Episode 72: Elias Mårtenson and the Kap array programming languageGNU APLA+IBM APL2NARS2000 APLDyalog APLKap Programming Language YouTube ChannelElias’ Blog Post: Array languages vs. the curse of the spreadsheetKap HashMapThe Carlisle Group GitHub (APL Repos)Design Patterns vs Anti pattern in APL by Aaron W Hsu at FnConf17Co-dfnsKap HashMapsKap if/elseJelly Languagearray/standard-lib/base-functions.kaparray/standard-lib/output3.kapKai Schmidt: The Quest for Tacit; Combinators, Arrays, and BeyondLang NEXT 2014 Panel Systems Programming in 2014 and Beyond

In this episode, Conor interviews Marshall Lochbaum, creator of the BQN, I and Singeli programming languages.SocialsTacit Talk YouTube PlaylistConor Hoekstra (Twitter)Conor Hoekstra (GitHub)About the GuestMarshall Lochbaum is the creator of the I, BQN and Singeli programming languages. He discovered J in high school and has made contributions to the J interpeter. He worked at Dyalog Ltd from 2017 to 2020 at which point he left to focus on developing BQN. He has also been a panelist on the ArrayCast podcast since 2022.Show NotesDate Recorded: 2024-05-27Date Released: 2024-05-28Marshall Lochbaum’s APL Wiki PageBQN Programming LanguageI Programming LanguageSingeli Programming LanguageI ExamplesWhere APL Glyphs Came From (Timeline of APL primitives)ArrayCast Episode 7: Marshall Lochbaum and the BQN array language

In this episode, Conor interviews Kai Schmidt, creator of the Uiua language.SocialsTacit Talk YouTube PlaylistConor Hoekstra (Twitter)Conor Hoekstra (GitHub)About the GuestKai Schmidt is a Rust developer, language enthusiast and the creator of the Uiua programming language, a general purpose, stack-based, array-oriented programming language.Show NotesDate Recorded: 2024-05-10Date Released: 2024-05-11UiuaGleam LanguageKap LanguageUiua Padproglangcast PodcastCombinators in UiuaCombinatory Programming blog by Zach SmithPlanet Notation in Uiua