Tacit Talk

In this episode, Conor highlights the On Notation keynote at RacketCon 2026 and the work of Pat Hanrahan, the latter part of the episode is a Notebook LLM generated conversation.

Socials

• Tacit Talk YouTube Playlist
• Conor Hoekstra: LinkTree / Bio

Show Notes

Date Released: 2026-10-19

• On Notation
• Pat Hanrahan
• RSL
• VizQL
• A History of Mathematical Notations by Florian Cajori
• The Elements of Typographic Style by Robert Bringhurst

In this episode, "Representation-Driven Dispatch" (generated by Claude 4.6 Opus) is read by the Speechify text-to-speech app.

Socials

• Tacit Talk YouTube Playlist
• Conor Hoekstra: LinkTree / Bio

Show Notes

Date Released: 2026-04-15

• Representation-Driven Dispatch

In this episode, Conor interviews Madeline Vergani about TinyAPL 0.13, inverses, AP8L and more!

Socials

• Tacit Talk YouTube Playlist
• Conor Hoekstra: LinkTree / Bio

About the Guest

Madeline Vergani is the creator of TinyAPL, the Omnibar and AP8L.

Show Notes

Date Recorded: 2026-03-30
Date Released: 2026-03-31

• Madeline Vergani on APL Wiki
• TinyAPL
• TinyAPL on APL Wiki
• TinyAPL Inverse
• Omnibar
• TinyAPL Combinators
• ArrayCast Episode 88: Madeline Vergani and tinyapl
• Tacit Talk Episode 14: TinyAPL with Madeline Vergani
• Madeline's Blog
• Most recent blog post
• AP8L

In this episode, the 1972 paper "Algebra as a Language" by Kenneth E. Iverson is read by the Speechify text-to-speech app.

Socials

• Tacit Talk YouTube Playlist
• Conor Hoekstra: LinkTree / Bio

Show Notes

Date Released: 2026-03-28

• Algebra 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.

Socials

• Tacit Talk YouTube Playlist
• Conor Hoekstra: LinkTree / Bio

Show Notes

Date Released: 2026-03-18

• From List Calculus to Array Calculi
• An 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.

Socials

• Tacit Talk YouTube Playlist
• Conor Hoekstra: LinkTree / Bio

Show Notes

Date Released: 2026-03-14

• Richard Bird's Algebraic Laws for Program Calculation
• An 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.

Socials

• Tacit Talk YouTube Playlist
• Conor Hoekstra: LinkTree / Bio

Show Notes

Date Released: 2026-03-02

• Notation 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.

Socials

• Tacit Talk YouTube Playlist
• Conor Hoekstra: LinkTree / Bio

About the Guest

Adám 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 Notes

Date Recorded: 2026-01-01
Date Released: 2026-01-02

• Dyalog
• Dyalog 20.0
• TryAPL
• Behind is Here
• Using the Behind Operator in Dyalog APL // APL Programming // NEW in Dyalog v20.0
• ArrayCast Podcast
• Dyalog User Meeting YouTube Channel
• Dyalog Ltd YouTube Channel
• Dyalog 20.0 Top 5 Features
• APL Quest
• APL Challenge
• Working with Array Notation in Dyalog APL // APL Programming // NEW in Dyalog v20.0
• Inline Tracing in Dyalog // APL Programming // NEW in Dyalog v20.0
• Using the Behind Operator in Dyalog APL // APL Programming // NEW in Dyalog v20.0
• Running External Programs with ⎕SHELL // APL Programming // NEW in Dyalog v20.0
• Namespace Manipulation and Data Extraction // APL Programming // NEW in Dyalog v20.0
• The Beauty of Algorithms (code_report YouTube Video)
• TinyAPL Extra Arguments
• APL Session from Recording
• Kap Forks
• J Train Table
• Elimination 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.

Socials

• Tacit Talk YouTube Playlist
• Conor Hoekstra: Twitter | BlueSky | Mastodon

About the Guests

Max 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 Notes

Date Recorded: 2025-10-05
Date Released: 2025-12-29

• Tacit Talk Episode 28: Co-dfns & AI with Aaron Hsu
• ArrayCast Episode 22: Josh David, APL in Industry
• BCA Research
• CTFP Videos
• APL Open Jobs

In this episode, Conor chats with Aaron Hsu live from Minnowbrook 2025 about Co-dfns, fonts, AI and more!

Socials

• Tacit Talk YouTube Playlist
• Conor Hoekstra: Twitter | BlueSky | Mastodon

About the Guests

Aaron 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 Notes

Date Recorded: 2025-10-04
Date Released: 2025-10-22

• ADSP Episode 197: 🇬🇧 Algorithms & Tersity with Aaron Hsu
• ADSP
• ArrayCast
• ADSP Episode 111: C++23 Ranges, 2022 Retro & Star Wars
• APL Fonts
• Pragmata Pro Font
• Stanley Jordan
• Co-dfns
• Co-dfns 4.1.4
• Co-dfns Tweet
• ArrayFire
• DyalogScript
• Learning APL
• ArrayCast Episode 114: Gary Bergquist and Zark Utilities