The Array Cast

Array Cast - January 8, 2022 Show Notes Many thanks to Rodrigo Girão Serrão and Bob Therriault for collecting these links. 00:01:56 Episode 17 of The Array Cast, the dyadic hook https://www.arraycast.com/episodes/episode17-tacit4-the-dyadic-hook 00:02:25 FnConf 2022, the conference Aaron Hsu is attending https://www.functionalconf.com/ 00:02:28 Aaron Hsu video https://www.youtube.com/watch?v=uEEJDq6cNTs 00:03:39 Episode 6 of The Array Cast with Henry Rich https://www.arraycast.com/episodes/episode-06-henry-richs-deep-dive-into-j 00:05:07 J 9.03 release notes https://code.jsoftware.com/wiki/System/ReleaseNotes/J903 00:06:20 Invisible Modifiers https://code.jsoftware.com/wiki/Vocabulary/fork#invisiblemodifiers 00:07:20 Fork https://code.jsoftware.com/wiki/Vocabulary/fork 00:08:10 Modifier https://code.jsoftware.com/wiki/Vocabulary/Modifiers 00:10:24 ArrayCast Tacit Episodes https://www.arraycast.com/episodes/episode-09-tacit-programming https://www.arraycast.com/episodes/episode11-why-tacit https://www.arraycast.com/episodes/episode15-tacit-3-and-other-topics https://www.arraycast.com/episodes/episode17-tacit4-the-dyadic-hook 00:12:43 ButIfNull https://www.jsoftware.com/help/jforc/empty_operands.htm#_Toc191734378 00:15:20 Higher Order Functions https://en.wikipedia.org/wiki/Higher-order_function 00:25:30 The J Parser https://www.jsoftware.com/help/jforc/parsing_and_execution_i.htm#_Toc191734584

Array Cast - December 25, 2021 Show Notes Many thanks to Adám Brudzewsky for collecting these links 00:01:30 Ken Iverson: https://apl.wiki/Ken_Iverson 00:01:30 J903: https://code.jsoftware.com/wiki/System/Installation/J903 00:02:21 APL logo: https://apl.wiki/APL_logo 00:02:51 I.P. Sharp: https://apl.wiki/I.P._Sharp_Associates 00:04:12 APL⋆PLUS: https://apl.wiki/APL*PLUS 00:04:12 Tacit programming: https://apl.wiki/Tacit_programming 00:04:12 Hook: https://apl.wiki/Hook 00:05:15 Hook in J: https://code.jsoftware.com/wiki/Vocabulary/hook 00:07:36 BQN: https://apl.wiki/BQN 00:07:36 Fork: https://apl.wiki/Tacit_programming#3-trains 00:08:20 Beside: https://apl.wiki/Beside 00:09:46 ADSP C++ episode: https://adspthepodcast.com/2021/12/10/Episode-55.html 00:09:46 ADSP BQN episode: https://adspthepodcast.com/2021/12/17/Episode-56.html 00:10:30 BQN solutions: https://github.com/codereport/LeetCode/blob/master/0269_Problem_1.bqn#L5 00:10:31 Iota sequence: https://apl.wiki/Index_Generator 00:10:31 J solution: https://tio.run/##y/r/303B1kpBWyFTjys1OSNfwdBAwU3B9P9/AA 00:12:22 Stephen's blog post: https://www.5jt.com/the-rest-is-silence 00:12:22 APL solution: https://tryapl.org/?clear&q=%E2%8E%95IO%E2%86%900%20%E2%8B%84%20F%20%E2%86%90%20%2B%E2%88%98%E2%8D%B3%20%E2%8B%84%2010%20F%205&run 00:16:15 BQN solution using After: https://mlochbaum.github.io/BQN/try.html#code=RiDihpAgK+KfnOKGlQoxMCBGIDU= 00:18:21 The [APL] Orchard:

Array Cast - December 11, 2021 Show Notes Many thanks to Adám Brudzewsky for collecting these links 00:01:53 Dyalog ’21 videos: https://dyalog.tv/Dyalog21 00:02:10 APL ∊ BCN: https://apl.wiki/APL_∊_BCN 00:02:10 Advent of Code: https://apl.wiki/Advent_of_Code 00:02:56 J903 Beta: https://code.jsoftware.com/wiki/System/Installation#J903_BETA 00:03:49 Brooke Allen's website: https://brookeallen.com/ 00:06:32 COBOL: https://en.wikipedia.org/wiki/COBOL 00:06:32 COBOL reserved words: https://www.ibm.com/docs/en/iis/9.1?topic=words-cobol-reserved 00:07:01 Fortran: https://en.wikipedia.org/wiki/Fortran 00:07:01 Iverson’s A Programming Language textbook: http://apl.wiki/A_Programming_Language 00:07:41 APL\360 manual: http://www.bitsavers.org/pdf/ibm/apl/GH20-0683-1_APL_360_Users_Manual_Mar70.pdf 00:09:11 Iverson's algebra book: https://www.jsoftware.com/books/pdf/algebra.pdf 00:11:12 BASIC https://en.wikipedia.org/wiki/BASIC 00:21:45 IBM 5110: https://en.wikipedia.org/wiki/IBM_5110 00:23:19 IBM PC: https://en.wikipedia.org/wiki/IBM_Personal_Computer 00:27:31 Dennis Shasha: https://en.wikipedia.org/wiki/Dennis_Shasha

Array Cast - November 27, 2021 Show Notes 00:00:42 J Wiki: https://code.jsoftware.com/wiki/Main_Page 00:01:04 APL Wiki: https://apl.wiki 00:01:14 Vector Journal: https://vector.org.uk/ 00:02:04 J Forums: https://code.jsoftware.com/wiki/System/Forums 00:03:47 Tacit programming: https://en.wikipedia.org/wiki/Tacit_programming 00:03:58 Previous episodes on tacit programming: https://www.arraycast.com/episodes/episode-09-tacit-programming and https://www.arraycast.com/episodes/episode11-why-tacit 00:04:51 Perl weekly challenge 88: https://theweeklychallenge.org/blog/perl-weekly-challenge-088/ 00:07:53 Adám's initial solution in APL: https://tryapl.org/?clear&q=%7B%C3%97%2F%E2%8D%B5%5B~%E2%8D%A41%200%E2%8D%A8%E2%8D%B3%E2%89%A2%E2%8D%B5%5D%7D10%205%207%208&run 00:10:14 Stephen's initial solution in K: https://tio.run/##y9bNS8/7/79aQ0u/QlO1otbQQMFUwVzB4v9/AA 00:10:14 Stephen's initial solution in APL: https://tryapl.org/?clear&q=%7B(%C3%97%2F%E2%8D%B5)%C3%B7%E2%8D%B5%7D10%205%207%208&run 00:11:51 Bob's J solution: https://tio.run/##y/oPBIZqGlr6MXqahgYKpgrmChYKAA and video at https://www.youtube.com/watch?v=0GPoCk__2lw 00:12:06 Conor's revamp of J into C++: https://www.youtube.com/playlist?list=PLVFrD1dmDdvfVhYLU_iKkV67X9XqCJLWe 00:12:28 Outfix: https://code.jsoftware.com/wiki/Vocabulary/bslashdot#dyadic 00:13:27 Conor's solutions: https://github.com/manwar/perlweeklychallenge-club/tree/master/challenge-088/conor-hoekstra 00:16:40 Conor's YouTube video: https://youtu.be/bXsKo2ZhgTg

Array Cast - November 13, 2021 Show Notes Link to presentation resources of Dialog ‘21 https://www.dyalog.com/user-meetings/dyalog21.htm 00:00:30 Dyalog User Meeting '21: https://www.dyalog.com/user-meetings/dyalog21.htm 00:03:03 Richard Park's presentation on the Dyalog Media Update: TBA 00:04:10 ShapeRank: https://github.com/f5devcentral/shapeRank 00:05:50 Gitte on Array Cast: https://www.arraycast.com/episodes/episode12-gitte-christensen 00:07:45 Brian Becker's presentation about Packaging Dyalog Tools / Tatin: TBA 00:09:05 Hashback #! scripting presentation: TBA 00:09:05 Link presentation: TBA 00:11:27 Rodrigo's presentation on Py'n'APL: TBA 00:14:10 C++ compiler explorer: https://godbolt.org/ 00:21:00 Ken Iverson's “Notation as a Tool of Thought” Paper (pdf): https://www.eecg.utoronto.ca/~jzhu/csc326/readings/iverson.pdf 00:27:21 Kimmo Linna's RSConnect: https://github.com/kimmolinna/rsconnect 00:29:15 TamStat: http://www.tamstat.com/ 00:33:24 CodeGolf website: http://codegolf.stackexchange.com/ 00:33:59 The APL Orchard: The APL Orchard 00:53:51 Aaron Hsu on “The Fallacy of Unit Testing”: https://www.sacrideo.us/the-fallacy-of-unit-testing/

Array Cast - October 30, 2021 Show Notes 00:00:00 Roger Hui: https://apl.wiki/Roger_Hui 00:00:00 Eric Iverson: https://apl.wiki/Eric_Iverson 00:00:00 Eric Iverson's announcement: https://www.jsoftware.com/pipermail/programming/2021-October/059091.html 00:00:00 J: https://apl.wiki/J 00:00:00 Ken: https://apl.wiki/Ken_Iverson 00:02:24 Dyalog '21: https://www.dyalog.com/user-meetings/dyalog21.htm 00:02:24 Memorial service: https://youtube.com/watch?v=_8FG81Ze1aM 00:02:51 Morten Kromberg: https://apl.wiki/Morten_Kromberg 00:02:51 Dyalog Ltd.: https://apl.wiki/Dyalog_Ltd. 00:04:11 Gitte Christensen: https://apl.wiki/Gitte_Christensen 00:04:59 John Scholes: https://apl.wiki/John_Scholes 00:04:59 Dan Baronet: https://apl.wiki/Dan_Baronet 00:05:53 Pearly gates: https://en.wikipedia.org/wiki/Pearly_gates 00:06:22 Galactic Emperor: https://www.jsoftware.com/papers/50/50_49.htm 00:06:22 Monument quality code: https://forums.dyalog.com/viewtopic.php?f=30&t=1638&p=6456&hilit=monument#p6453 00:06:58 Rob Hodgkinson's response: https://www.jsoftware.com/pipermail/programming/2021-October/059124.html 00:08:50 I.P. Sharp Associates: https://apl.wiki/I.P._Sharp_Associates 00:09:51 Arthur Whitney: https://apl.wiki/Arthur_Whitney 00:11:30 Adaytum: https://www.computerweekly.com/feature/Cognos-acquires-Adaytum-and-bolsters-performance-management-agenda 00:12:16 Jsoftware: https://apl.wiki/Jsoftware 00:13:05 Cognos: https://en.wikipedia.org/wiki/Cognos 00:14:24 Dfns: https://apl.wiki/Dfn 00:14:24 First axis emphasis: https://apl.wiki/Leading_axis_theory 00:14:24 Sharp APL: https://apl.wiki/Sharp_APL 00:15:59 Ravel: https://apl.wiki/Ravel 00:15:59 Table function: https://apl.wiki/Table 00:16:35 Identity functions: https://apl.wiki/Same 00:16:35 Take: https://apl.wiki/Take 00:16:35 Take:

Array Cast - October 16, 2021 Show Notes 0:02:00 Dyalog 21 November 8-9 0:02:30 APL Campfire 0:03:23 APL Logo Design 0:36:55 Dyalog Forums 0:38:23 APL Wiki 0:40:00 Dyalog Search Resource Map 1:00:45 APL Orchard 1:08:00 Joel Hough 2011 Contest Winner 1:11:18 Asher Mancinelli’s YouTube channel

Array Cast - October 18, 2021 Show Notes 0:01:34 Dyalog 21 November 8-9 0:03:25 Henry Rich talks Tacit on Array Cast 0:03:40 Conjunctions and Adverbs in J 0:05:24 Henry Rich’s email announcing Tacit Modifiers 0:09:00 Tacit definition 0:09:20 Tacit version of Average in J 0:10:40 Inverses in J 0:11:42 Obverse conjunction in J 0:14:10 Category Theory 0:16:15 Guy Steele “Growing a Language” APL mention p. 6 0:50:40 Stephen Taylor’s blog post on Tacit Programs 1:02:00 Travis Oliphant interviewed by Lex Fridman

Array Cast - September 18, 2021 Show Notes 0:01:50 The Ridiculously Early J Morning Show (youtube) The Ridiculously Early J Morning Show (twitch) 0:02:54 Eric_Iverson 0:03:10 Ken_Iverson 0:05:18 A_Programming_Language 0:07:28 Elementary_Functions_An_Algorithmic_Treatment 0:09:14 IBM_System/360 0:09:59 I.P._Sharp_Associates 0:10:13 APL\1130 0:11:39 Ian_Sharp 0:12:14 Larry_Breed 0:12:36 Time-sharing 0:13:01 SHARP_APL 0:13:11 Siemens_System_4004 (in German) 0:15:54 Thomas_J._Watson_Research_Center ("Mohansic Labs") 0:16:44 IBM_Research 0:18:04 PL/I 0:18:25 Strand_notation 0:18:33 Enclose 0:18:33 Array_model 0:18:33 Box 0:20:22 APL2 0:21:40 Zoo Story: How the I.P. Sharp APL Development Group Got its Name 0:22:30 IBM_Basic_Assembly_Language_and_successors 0:24:30 Index Origin 0:25:19 APL\3000 (Larry Breed's compiler) 0:30:36 IBM_Personal_Computer 0:31:31 Roger_Moore_(computer_scientist) 0:31:35 Intel_8086 0:34:35 Roger_Hui 0:40:04 J1990 (1990 conference paper) 0:41:10 Jsoftware (Iverson Software Inc.) 0:48:22 https://github.com/jsoftware/jsource (source) 0:57:03 Catalan Labs (video) 1:03:04 https://xkcd.com/2343/ 1:03:23 Jeh_language 1:09:05

Array Cast - September 4, 2021 Show Notes 0:00:16 Larry Breed Obituary Larry Breed Memorial on Zoom - Sept. 12, 1:00pm PDT 0:02:05 The Ridiculously Early J Morning Show (twitch) The Ridiculously Early J Morning Show (youtube) 0:03:38 Tacit Programming 0:09:06 16 APL Amuse Bouches (Roger Hui) 0:10:03 Original ‘Swap’ Character 0:19:49 The Power of Composition (Scott Wlaschin) 0:20:55 Leetcode 1678 in APL (Rodrigo Girão Serrão) 0:23:26 J parser (J for C Programmers) 0:31:00 +/ 0:35:07 One Problem - 16 Programming Languages 0:38:09 Fork 0:38:39 Cap 0:39:25 At Atop 0:47:50 Hook 0:52:15 Phrasal Forms (Iverson and McDonnell) 0:54:50 Palindromic Palindrome Checker in APL 1:02:50 Fantasy Birds The Rest is Silence - Invincible Summer (Stephen Taylor’s Essay on Tacit Programming)

0:01:45 Time Complexity of Algorithms 0:01:50 APL Orchard 0:03:40 Array Programming Languages (Wikipedia) 0:06:08 Project Euler 0:14:30 Conor’s Tweet of the Kaldane Algorithm 0:14:53 BQN programming language: 0:18:16 Fold Conjunction in J 0:19:47 ADSP #25 Podcast 0:30:46 Downloads for k 0:30:46 Shakti Homepage 0:53:21 Jd database 0:59:23 APL Campfire 1:00:05 Download for q 1:00:05 Starting out in q

0:01:28Stack Overflow Developer Survey:https://stackoverflow.blog/2021/08/02/2021-stack-overflow-developer-survey-results/ 0:01:45Most loved/dreaded programming languages:https://insights.stackoverflow.com/survey/2021#section-most-loved-dreaded-and-wanted-programming-scripting-and-markup-languages 0:01:47Top-paying programming languageshttps://insights.stackoverflow.com/survey/2021#section-top-paying-technologies-top-paying-technologies 0:02:45Array language companies:https://github.com/interregna/arraylanguage-companies 0:03:51I programming language:https://github.com/mlochbaum/ILanguage 0:03:53BQN programming language:https://github.com/mlochbaum/BQN 0:04:14Henry Rich:https://aplwiki.com/wiki/Henry_Rich 0:04:32TI-BASIC programming language:https://en.wikipedia.org/wiki/TI-BASIC 0:05:21J conference talks:https://code.jsoftware.com/wiki/Community/Conference2012/Talks/ImageProcessing and https://code.jsoftware.com/wiki/Community/Conference2014/Talks/UsingDataAsCode 0:07:42Roger Hui:https://aplwiki.com/wiki/Roger_Hui 0:06:22Factor programming language:https://en.wikipedia.org/wiki/Factor_(programming_language) 0:07:01Tacit programming:https://en.wikipedia.org/wiki/Tacit_programming 0:07:18Just-in-time compilation:https://en.wikipedia.org/wiki/Just-in-time_compilation 0:08:38Over and Atop:https://aplwiki.com/wiki/Function_composition 0:08:46Unique mask:https://aplwiki.com/wiki/Nub_Sieve 0:09:18APL Wiki:https://apl.wiki 0:10:12APL Wiki's article on A+:https://aplwiki.com/wiki/A%2B 0:11:07APL Wiki's article on BQN:https://aplwiki.com/wiki/BQN 0:11:40BQN chat room:https://app.element.io/#/room/#bqn:matrix.org 0:13:26Apple food puns:https://aplwiki.com/wiki/Humour#Apples 0:15:27Glee, a left-to-right APL derivative:https://withglee.com/Frames/GFMain.htm 0:17:29Explicit defintion operatorhttps://code.jsoftware.com/wiki/Vocabulary/com 0:17:45Dfns:https://aplwiki.com/wiki/Dfn 0:17:58Context-free:https://mlochbaum.github.io/BQN/doc/context.html 0:18:05Array models:https://aplwiki.com/wiki/Array_model 0:18:20Based array model:https://mlochbaum.github.io/BQN/doc/based.html 0:23:14J Gerunds:https://code.jsoftware.com/wiki/Vocabulary/GerundsAndAtomicRepresentation 0:33:02Boxes:https://aplwiki.com/wiki/Box 0:36:24Strands:https://aplwiki.com/wiki/Strand_notation 0:36:33Strings and lists in BQN:https://mlochbaum.github.io/BQN/doc/arrayrepr.html#list-literals 0:45:25APL's Power operator:https://help.dyalog.com/latest/#Language/Primitive%20Operators/Power%20Operator.htm 0:45:5

Array Cast - July 24, 2021 Show Notes 02:05 Ian Sharp (1932-2021) 03:06 Whitney Smith interview with Ian Sharp 20:20 Dissect 34:41 Monument.ai’s Parallel Jx 43:35 Dyalog APL’s Experimental Parallel Feature 43:55 Dyalog APL’s Experimental Future Feature 54:00 Fold in J 1:09:30 Nuvoc J for C Programmers 1:11:17 Quintana’s Jx 1:14:47 BQN 1:19:09 2021 Dyalog APL Competition APL Campfire 1:20:00 Interactive Kx Academy 1:20:45 TryAPL.org source available

Array Cast - July 10, 2021 Show Notes 02:15 Jean Iverson (1925-2021) 04:40 Daniel Sockwell’s email 13:09 J phrases 13:15 Special Combinations in J 23:00 Emacs in q Dyalog J 26:30 Shebang in q 27:15 J console JHS JQt 29:52 Joey Tuttle Piping Solution in J 33:20 Rodrigo’s Leetcode Solution to Compression 38:00 Regular Expressions Quote 51:17 q Introspecting Functions 57:41 Growing a Language - Steele 56:50 Dyalog Extended Prime Polyfill 59:30 Daniel Sockwell’s suggestions for learning Raku To Compute a Constant of-Calculus: A Treatise on Multiple Ways for a taste of what makes Raku worth learning The Raku Guide for a general intro The #raku IRC channel on irc.libera.chat or the r/rakulang subreddit to say hi/get answers to any questions. 59:50 APL Campfire

Array Cast - Show June 26, 2021 Notes 02:15 Nested Array Theory - Scholes https://aplwiki.com/wiki/Array_model#Nested_array_theory 05:37 What is an Array -Hui https://www.jsoftware.com/papers/array.htm 07:07 Is a Scalar an Array - Hui and Rich https://code.jsoftware.com/wiki/Essays/Scalars 07:47 Nuvoc https://code.jsoftware.com/wiki/NuVoc 20:38 Inverted Table - Hui https://code.jsoftware.com/wiki/Essays/Inverted_Table 34:08 Rectangles All the Way Down - Thompson https://dyalog.tv/Dyalog18/?v=mK2WUDIY4hk 36:04 Chunking https://en.wikipedia.org/wiki/Chunking_(psychology) 41:31 Shape Thinking - Thomas https://www.youtube.com/watch?v=ng-QNLdgQeY 44:30 Perlis Epigrams https://www.cs.yale.edu/homes/perlis-alan/quotes.html 55:07 J phrases https://www.jsoftware.com/help/phrases/contents.htm APL phrases https://aplcart.info/ q phrases https://code.kx.com/phrases/intro/ 58:58 tryAPL.org http://tryapl.org/ 59:14 APL Orchard http://apl.chat/ 1:01:30 Dyalog ‘21 https://www.dyalog.com/user-meetings/dyalog21.htm 1:02:06 Campfire https://aplwiki.com/wiki/APL_Campfire 1:02:12 Dyalog Problem Competition https://www.dyalogaplcompetition.com/?goto=welcome Thinking in APL Part 1 - Dyalog webinar https://dyalog.tv/Webinar/?v=myoK22rq1jk Thinking in APL Part 2 - Dyalog webinar https://dyalog.tv/Webinar/?v=Qzwn6z3y0DA

Array Cast - Show June 12, 2021 Notes 10 Most(ly Dead) Influential Programming Languages https://www.hillelwayne.com/post/influential-dead-languages/ Pharo Launcher https://pharo-project.github.io/pharo-launcher/ tatin APL Package Manager in Development https://tatin.dev/ J addons https://code.jsoftware.com/wiki/Addons/Developers_Guide Adam’s Style Guide for APL https://abrudz.github.io/style/ Design Patterns vs Anti pattern in APL Aaron W Hsu https://www.youtube.com/watch?v=v7Mt0GYHU9A APLcart https://apl.wiki/APLcart J phrases https://www.jsoftware.com/help/phrases/contents.htm J phrases Permutations https://www.jsoftware.com/help/phrases/permutations.htm J Stats addons for Histograms https://code.jsoftware.com/wiki/Addons/stats/base Dyalog APL D-functions https://apl.wiki/Dfn Q Tips by Nick Psaris https://www.goodreads.com/book/show/25221469-q-tips J Locales https://code.jsoftware.com/wiki/Vocabulary/Locales J z-Locale https://code.jsoftware.com/wiki/Vocabulary/ZeeLocale Henri Brudzewsky’s Patented Slogan https://codegolf.stackexchange.com/q/119361/43319 Family Tree of Array Languages https://aplwiki.com/wiki/Family_tree_of_array_languages Shakti https://shakti.com/ Lambda in Microsoft Excel https://www.microsoft.com/en-us/research/blog/lambda-the-ultimatae-excel-worksheet-function/ Kx in Academia https://kx.com/blog/kx-in-academia-carnegie-mellon-university-teaching-with-kdb/ Dyalog for the Raspberry Pi https://www.dyalog.com/dyalog/raspberry-pi.htm Code Golf https://apl.wiki/Code_golf CoRecursive Episode with Conor Hoekstra https://corecursive.com/065-competitive-coding-with-conor-hoekstra/ Advent of Code https://apl.wiki/Advent_of_Code tryAPL.org https://tryapl.org/ Books by Nick Psaris Q Tips https://www.goodreads.com/book/show/25221469-q-tips Vector Review of Q tips https://vector.org.uk/book-review-q-tips-fast-scalable-and-maintainable-kdb-2/ Fun Q https://www.amazon.com/dp/1734467509 Vector Review of Fun Q https://vector.org.uk/book-review-fun-q-a-functional-introduction-to-machine-learning-in-q/

Array Cast - Show 1 Notes [Larry Breed (Wikipedia)] https://en.wikipedia.org/wiki/Lawrence_M._Breed [No Stinking Loops - Stevan Apter] http://nsl.com/ [J for C Programmers - Henry Rich] https://www.jsoftware.com/help/jforc/contents.htm [Consecutive Ones Problem - ADSP podcast Episode 25] https://adspthepodcast.com/2021/05/14/Episode-25.html [Consecutive Ones Problem - Bob Therriault YouTube video] https://youtu.be/lbi_PMVbeaQ [LambdaCast]https://www.listennotes.com/podcasts/lambdacast-lambdacast-c8bseLqG1Eg/ [Arthur Whitney - Interviewed by Bryan Cantrill for ACMQueue] https://queue.acm.org/detail.cfm?id=1531242 Shakti.com [I Love APL and Haskell #2 - Conor Hoekstra] https://www.youtube.com/watch?v=a7CSK7HNEWQ Online intros to [q] https://code.kx.com/q/learn/ [k] https://estradajke.github.io/k9-simples/ [J] https://code.jsoftware.com/wiki/Studio [APL] https://aplwiki.com/wiki/Learning_resources J forums [Stock Ups and Downs thread] http://www.jsoftware.com/pipermail/programming/2021-May/058201.html [Aaron Hsu's tree algorithm thread] http://www.jsoftware.com/pipermail/programming/2021-May/058228.html APL [Mastering Dyalog APL] https://mastering.dyalog.com/README.html [APL Forum]http://apl.chat/ [Instruction in Dyalog APL]Course.dyalog.com Online Access to Languages [APL]TryAPL.org [J]https://tio.run/# [k] https://kparc.com/k/ Downloads for[q] https://kx.com/developers/download-licenses/ [k] https://ngn.bitbucket.io/k.html [J] https://code.jsoftware.com/wiki/System/Installation [APL] https://aplwiki.com/wiki/Running_APL Arraycast.com/resources Community Gathering Places[Reddit] https://www.reddit.com/r/apljk/ [Discord] https://discord.gg/yHna7nt7zx [APL campfire June 6th at 18:00 UTC] https://aplwiki.com/wiki/APL_Campfire

[Opening ‘cow sheep cat dog’] https://aplwiki.com/wiki/Simple_examples [Conor Hoekstra ‘Algorithms as a Tool of Thought’] https://dyalog.tv/APLSeeds21/?v=GZuZgCDql6g [Alan Perlis ‘In Praise of APL’] https://apl.wiki/Alan_Perlis [Key] https://help.dyalog.com/latest/#Language/Primitive%20Operators/Key.htm [Under] https://code.jsoftware.com/wiki/Vocabulary/ampdot [Nuvoc - J Vocabulary] https://code.jsoftware.com/wiki/NuVoc [J] https://www.jsoftware.com https://code.jsoftware.com/wiki/Guides/Getting_Started [APL] https://apl.wiki https://tryapl.org [Stephen Taylor ‘Discovering APL’] https://aplwiki.com/wiki/Discovering_APL [k] http://shakti.com https://estradajke.github.io/k9-simples/ [q] https://code.kx.com/q/ https://code.kx.com/q/learn/