The APL Show podcast

By Adám Brudzewsky & Richard Park

Inspired by Ken Iverson’s paper “Notation as a Tool of Thought”, this podcast explores various aspects of notation, in the context of the APL programming language.... more

· Technology

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FAQs about The APL Show podcast:

How many episodes does The APL Show podcast have?

The podcast currently has 10 episodes available.

The APL Show podcast episodes:

June 02, 2023Terminology, Files, and Array Theory
Together with out first guest, Silas Poulson, we begin by discussing terminology, but then we go on a wild ride, mentioning the history of file operations, review of various primitives, APL’s array model, comparison of ways to apply functions, glyphs, syntax, and much more.
Video (YouTube) ∙ Audio (download)
Tokyo APL/J/K Meetup

Northern California APL ACM Chapter (APLBUG): Data I/O presentation/discussion

“Quad OR”

⍤ operator: Rank, Atop

Reverse

Reduce

File System Function: Component, Native

The Description of Finite Sequential Processes

Golf ball

Ray Polivka’s new book

Trains

Array

Materialise

Leading Axis Theory

Bracket axis

APL Germany

Overstrikes
...more
1h 11min
May 02, 2023Primitives Extravaganza Continued
We continue discussing the pros and cons of adding primitives, and go through a few more that could be useful to have.
Video (YouTube) ∙ Audio (download)
FinnAPL spring meeting

Tokyo APL/J/K Meetup

APL Array Notation Formal Proposal

Strand notation

Select primitive

Depth primitive

Reverse Compose primitive

Array Cast

German names for things

Formalism in Programming Languages

Matrix Division

Matrix Inversion

Bracket indexing

Squad indexing

Adám’s talk from Dyalog ‘22

Caret (∧)

Caron (∨)

Chevron

Array notation

Kronecker product

Join primitive

Right Shoe

Dyalog Extended

Dyalog Vision
...more
1h 14min
March 30, 2023Reaction to “Change the way you write. Change the way you think. — part 2”
Second part of our reaction to Xuanyi Chew’s presentation at DataEngBytes 2022.
Video (YouTube) ∙ Audio (download)
APL Seeds 23 videos

Part 1

Xuanyi Chew’s presentation

Adám’s father’s logo

Iverson’s “Important Characteristics of Notation”

ETL

Locomotive wheel arrangement

Electronic symbol notation
...more
1h 15min
March 09, 2023Reaction to “Change the way you write. Change the way you think. — part 1”
First part of our reaction to Xuanyi Chew’s presentation at DataEngBytes 2022.
Video (YouTube) ∙ Audio (download)
APL Problem Solving Competition

Kattis

APL Seeds ’23

APL Campfire

Linux Format 300

Xuanyi Chew’s presentation
...more
1h 7min
February 24, 2023Primitives Extravaganza
After introducing the constraints on primitive proliferation, we begin listing what we’d want, only to end up discussing the Under/Dual operator, and its issues.
Video (YouTube) ∙ Audio (download)
Under

Morten’s blog post about Under

Adám’s talk

Select

Behind

Depth
...more
1h 14min
January 27, 2023Processes and Structures
After establishing our new name, we look at graphical diagrams that implement the structure of a system, and compare to the evolution of Iverson Notation into today’s traditional user-defined functions in APL. We also discuss what aspects of that could be desirable in an integrated development environment.
Video (YouTube) ∙ Audio (download)
Reddit post Node based programming really doesn’t scale well

Iverson Notation

Traditional defined function (“tradfn”)
...more
1h 6min
December 05, 2022How to Structure APL Programs
High-level structuring of APL programs, abstraction levels, coding style, and building a tiny DSL for nicer code.
Video (YouTube) ∙ Audio (download)
Adám’s personal style guide
...more
1h 8min
November 01, 2022Functional Forms
Pros and cons of APL’s functional forms, and in which situations they should and shouldn’t be used.
Video (YouTube) ∙ Audio (download)
Functional forms

Traditional function (“tradfn”)

Tacit function

Adám’s style guide
...more
1h 2min
November 01, 2022Notational Awkwardnesses
Evolution of the 2D Iverson Notation into modern APL, alternative syntaxes, and also notational awkwardnesses stemming from binding strengths; stranding, bracket axis and indexing, issues with the rank operator, etc.
Video (YouTube) ∙ Audio (download)
Adám’s personal style guide
...more
1h 1min
October 06, 2022Indexing in APL vs Yorick
The indexing notation and broadcasting rules of the Yorick programming language based on a tweet by Jeremy Howard, and conclude that the two approaches achieve the same thing; one by manipulating data shape until broadcasting achieves desired result, the other by applying additional broadcasting rules on the existing shapes.
Video (YouTube) ∙ Audio (download)
The tweet in question

Yorick’s indexing
...more
58min

FAQs about The APL Show podcast:

How many episodes does The APL Show podcast have?

The podcast currently has 10 episodes available.