The APL Show podcast

Terminology, 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) [https://www.youtube.com/watch?v=ma31yxAP7u0&list=PLYKQVqyrAEj8Q7BdOgakZCAGf6ReO1cue] ∙ Audio (download) [/assets/audio/2023-06-02-Terminology-Files-and-Array-Theory.mp3] * Tokyo APL/J/K Meetup [https://www.meetup.com/en-US/apl-j-k-meetup/events/kkzgdtyfcjbzb/] * Northern California APL ACM Chapter (APLBUG): Data I/O presentation/discussion [https://apl.wiki/SIGAPL#APL_BUG] * “Quad OR” [https://help.dyalog.com/latest/#Language/System%20Functions/or.htm] * ⍤ operator: Rank [https://apl.wiki/Rank_(operator)], Atop [https://apl.wiki/Atop_(operator)] * Reverse [https://apl.wiki/Reverse] * Reduce [https://apl.wiki/Reduce] * File System Function [https://apl.wiki/Quad_name]: Component [https://help.dyalog.com/latest/#Language/System%20Functions/Summary%20Tables/Component%20Files.htm], Native [https://help.dyalog.com/latest/#Language/System%20Functions/Summary%20Tables/Native%20Files.htm] * The Description of Finite Sequential Processes [https://www.jsoftware.com/papers/DFSP.htm] * Golf ball [https://apl.wiki/Fonts#Historical_anecdote] * Ray Polivka’s new book [https://aplclass.com/book/] * Trains [https://apl.wiki/Train] * Array [https://apl.wiki/Array] * Materialise [https://apl.wiki/Materialise] * Leading Axis Theory [https://apl.wiki/Leading_axis_theory] * Bracket axis [https://apl.wiki/Function_axis] * APL Germany [https://apl-germany.de] * Overstrikes [https://apl.wiki/Overstrike]

Primitives 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) [https://www.youtube.com/watch?v=wvrT0LXVsUQ&list=PLYKQVqyrAEj8Q7BdOgakZCAGf6ReO1cue] ∙ Audio (download) [/assets/audio/2023-05-02-Primitives-Extravaganza-Continued.mp3] * FinnAPL spring meeting [https://www-finnapl-fi.translate.goog/tapahtumat/?_x_tr_sl=fi&_x_tr_tl=en&_x_tr_hl=en&_x_tr_pto=sc] * Tokyo APL/J/K Meetup [https://www.meetup.com/apl-j-k-meetup/events/kkzgdtyfchbtb/] * APL Array Notation Formal Proposal [https://www.dyalog.com/blog/2023/04/formal-proposal-for-apl-array-notation-seeking-feedback] * Strand notation [https://apl.wiki/Strand_notation] * Select primitive [https://apl.wiki/From] * Depth primitive [https://apl.wiki/Depth_(operator)] * Reverse Compose primitive [https://apl.wiki/Reverse_Compose] * Array Cast [https://arraycast.com] * German names for things [https://apl.wiki/German_terminology] * Formalism in Programming Languages [https://dl.acm.org/doi/pdf/10.1145/363921.363933] * Matrix Division [https://apl.wiki/Matrix_Divide] * Matrix Inversion [https://apl.wiki/Matrix_Inverse] * Bracket indexing [https://apl.wiki/Bracket_indexing] * Squad indexing [https://apl.wiki/Index_(function)] * Adám’s talk from Dyalog ‘22 [https://www.dyalog.com/user-meetings/dyalog22.htm#D15] * Caret [https://en.wikipedia.org/wiki/Caret] (∧) * Caron [https://en.wikipedia.org/wiki/Caret] (∨) * Chevron [https://en.wikipedia.org/wiki/Chevron_(insignia)] * Array notation [https://apl.wiki/Array_notation] * Kronecker product [https://en.wikipedia.org/wiki/Kronecker_product] * Join primitive [https://aplwiki.com/wiki/Raze] * Right Shoe [https://aplwiki.com/wiki/Right_Shoe] * Dyalog Extended [https://apl.wiki/Extended%20Dyalog%20APL] * Dyalog Vision [https://apl.wiki/Dyalog_APL_Vision]

Reaction 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) [https://www.youtube.com/watch?v=X9M6kBqjgOc&list=PLYKQVqyrAEj8Q7BdOgakZCAGf6ReO1cue] ∙ Audio (download) [/assets/audio/2023-03-30-Reaction-to-Change-the-way-you-write-Change-the-way-you-think-part-2.mp3] * APL Seeds 23 videos [https://dyalog.tv/APLSeeds23/] * Part 1 [/2023/03/30/Reaction-to-Change-the-way-you-write-Change-the-way-you-think-part-2.html] * Xuanyi Chew’s presentation [https://www.youtube.com/watch?v=KOuwZEtHZ_U&list=PL06aF1xtjRaEGsXxsiv0eTyvhPFgOETwP] * Adám’s father’s logo [https://i.stack.imgur.com/pEzT8.png] * Iverson’s “Important Characteristics of Notation” [https://www.jsoftware.com/papers/tot1.htm#1] * ETL [https://en.wikipedia.org/wiki/Extract,_transform,_load] * Locomotive wheel arrangement [https://en.wikipedia.org/wiki/Wheel_arrangement] * Electronic symbol notation [https://en.wikipedia.org/wiki/Electronic_symbol]

Reaction 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) [https://www.youtube.com/watch?v=SlA_T91gS6s&list=PLYKQVqyrAEj8Q7BdOgakZCAGf6ReO1cue] ∙ Audio (download) [/assets/audio/2023-03-09-Reaction-to-Change-the-way-you-write-Change-the-way-you-think-part-1.mp3] * APL Problem Solving Competition [https://www.dyalog.com/student-competition.htm] * Kattis [https://open.kattis.com] * APL Seeds ’23 [https://www.dyalog.com/apl-seeds-user-meetings/aplseeds23.htm] * APL Campfire [https://apl.wiki/APL_Campfire] * Linux Format 300 [https://linuxformat.com/linux-format-300.html] * Xuanyi Chew’s presentation [https://www.youtube.com/watch?v=KOuwZEtHZ_U&list=PL06aF1xtjRaEGsXxsiv0eTyvhPFgOETwP]

Primitives 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) [https://www.youtube.com/watch?v=69WP_2Sk_4M&list=PLYKQVqyrAEj8Q7BdOgakZCAGf6ReO1cue] ∙ Audio (download) [/assets/audio/2023-02-24-Primitives-Extravaganza.mp3] * Under [https://apl.wiki/Under] * Morten’s blog post about Under [https://www.dyalog.com/blog/2023/01/structural-vs-mathematical-under/] * Adám’s talk [https://dyalog.tv/Dyalog22/?v=itGiA56NSl8] * Select [https://apl.wiki/From] * Behind [https://apl.wiki/Reverse_Compose] * Depth [https://apl.wiki/Depth_%28operator%29]