Tacit #4 - the dyadic hook

The Array Cast

• Episode: Tacit #4 - the dyadic hook
• Website: The Array Cast
• Feed URL: https://www.arraycast.com/episodes?format=rss
• Duration: 01:14:19
• Published: 2021-12-25 09:00

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: https://apl.chat

00:30:03 (P)QRS in APL: https://tio.run/##SyzI0U2pTMzJT///P0DhUdsEhepHvbuAtOGjjhmP2iYrPOpuUVDXUNcBiuqoKwQogFhbddQ11Wu5AgmrD0RWH0RYfRCy@mDC6oOR1XM96psK0qFeoa6gEQg0K1hTQb1SHUU4QAEh8f8/AA

00:30:03 (P)QRS in J: https://tio.run/##hcw7CsAgEITh3lNMNwp2SSXkDj6OEAIhTVo9vdnOLBZ2w7/L9/QecQRsCCBpSU9Gmb7JcJIQgt3HtUqGenAmTUJaCUkLeRLySshaKJNQVkLRgrnO@wUrYZPoxYGNvxgxcu8f

00:33:30 Golfing: https://apl.wiki/Code_golf

00:33:42 Marshall Lochbaum's birds table: https://mlochbaum.github.io/BQN/doc/birds.html

00:33:42 Hook Conjunction? paper: https://code.jsoftware.com/wiki/Essays/Hook_Conjunction%3F

00:35:37 IsPalindrome in APL (or BQN): https://tio.run/##SyzI0U2pTMzJT///37M4IDEnMy@lKD83VeFR2wSFR12LHnUufNSzl@tR31SQAIoK9aLE5NTkxCJ17LIZ@UXFqer//wMA

00:35:37 IsPalindrome in J: https://tio.run/##y/r/37M4IDEnMy@lKD83VcHWSkHXqkaPKzU5I18BRUa9KDE5NTmxSB2bXEZ@UXGq@v//AA

00:36:41 APL\?: https://www.jsoftware.com/papers/J1990.htm

00:41:57 Applied inline in J: https://tio.run/##y/r/PzU5I19BQ9eqRk9TQb0oMTk1ObFInQtFNCO/qDhV/f9/AA

00:41:57 Applied inline in APL: https://tio.run/##SyzI0U2pTMzJT////1Hf1EdtExQedS581DHjUc/eR70rFNSLEpNTkxOL1LmwymbkFxWnqv//DwA

00:42:54 Atop "unary-binary": https://apl.wiki/Atop_(operator)

00:43:19 Beside/After "binary-unary": https://apl.wiki/Beside

00:45:25 Over: https://apl.wiki/Over

00:45:25 APL Wiki's table: https://apl.wiki/Function_composition

00:48:25 Marshall's table: https://youtu.be/czWC4tjwzOQ?t=1456

00:48:25 Adám's alternative table: https://youtu.be/Hln3zryunsw?t=1151

00:53:28 Ambivalent: https://apl.wiki/Ambivalent_function

00:55:01 Case-folding: https://help.dyalog.com/latest/#Language/System%20Functions/c.htm

00:55:01 Case-insensitive using Over: https://tryapl.org/?clear&q=%27Hello%27%20%E2%89%A1%E2%8D%A5%E2%8E%95C%20%27HELLO%27%20%E2%8B%84%20%27Hello%27%20%E2%8D%B3%E2%8D%A5%E2%8E%95C%20%27E%27%20%E2%8B%84%20%27L%27%20%E2%88%8A%E2%8D%A5%E2%8E%95C%20%27Hello%27&run

00:55:01 HTMLTag Over ⎕C: https://tryapl.org/?clear&q=HTMLTag%E2%86%90%7B%E2%8D%BA%E2%86%90%7B(%C2%AF8%E2%86%93%E2%8D%BA)%2C1%E2%86%93%E2%8D%B5%7D%20%E2%8B%84%20%E2%88%8A%27%3Ci%20class%3D%22%27%E2%8D%BA%27%22%3E%27%2C%E2%8D%B5%2C%27%3C%2Fi%3E%27%7D%20%E2%8B%84%20HTMLTag%E2%8D%A5%E2%8E%95C%27CONTENT%27%20%E2%8B%84%20%27MyClass%27HTMLTag%E2%8D%A5%E2%8E%95C%27CONTENT%27&run

00:55:01 HTML escape using Over: https://tryapl.org/?clear&q=HTMLTag%E2%86%90%7B%E2%8D%BA%E2%86%90%7B(%C2%AF8%E2%86%93%E2%8D%BA)%2C1%E2%86%93%E2%8D%B5%7D%20%E2%8B%84%20%E2%88%8A%27%3Ci%20class%3D%22%27%E2%8D%BA%27%22%3E%27%2C%E2%8D%B5%2C%27%3C%2Fi%3E%27%7D%20%E2%8B%84%20HTMLEsc%E2%86%90%27%5C%3C%27%20%27%26%27%E2%8E%95R%27%5C%26lt%3B%27%20%27%5C%26amp%3B%27%20%E2%8B%84%20HTMLTag%E2%8D%A5HTMLEsc%27H%E2%82%82O%3Cblood%27%20%E2%8B%84%20%27r%26d%27HTMLTag%E2%8D%A5HTMLEsc%27H%E2%82%82O%3Cblood%27&run

00:59:24 Advent of Code: https://apl.wiki/Advent_of_Code

00:59:24 Execute comma separated list: https://tryapl.org/?clear&q=%E2%8D%8E%2731%2C41%2C59%27&run

01:00:49 Parsing text data files: https://youtu.be/AHoiROI15BA

01:03:13 Advent of Q: https://github.com/StephenTaylor-Kx/adventofq

01:03:46 Dfn syntax: https://apl.wiki/Dfn

01:03:46 Dfn default left arguments: https://apl.wiki/Dfn#Default_left_arguments

01:03:46 Cover for Minus: https://tryapl.org/?clear&q=Minus%E2%86%90%7B%E2%8D%BA%E2%86%90%E2%8A%A2%20%E2%8B%84%20%E2%8D%BA-%E2%8D%B5%7D%20%E2%8B%84%2010%20Minus%203%20%E2%8B%84%20Minus%205&run

01:08:26 "Alpha gets" on APLcart: https://aplcart.info?q=%E2%8D%BA%E2%86%90

01:09:19 Dyadic Hook in Python: https://tio.run/##K6gsycjPM7YoKPr/PyM/P1vBViEnMTcpJVEhTSfdCsqs0Km0StOo0EnXqNTU5CrIKS1GKAPJRVdopyqk5RcppCpk5ilUxnJl5pckApUUJealp3IVFGXmlWiADNcAadUBSWpqGBromGpq/v8PAA

01:09:34 "define the hook in any functional language":
JavaScript: https://tio.run/##JY3BCsMgEETvfkWOu9Qu7aHQi4F@R@lBgrE2tiuaBv16o@Q0zDxm5qM3nabownre7rW@mZdBDTBLi2qELEuTuamFgiiC/6eOj7zQVwcAI10z@WRQOF5141mNTyJ6xKgLZKTFlAT4EhP/EntDni30J@h7spcQrhd5Q6x1Bw

Ruby: https://tio.run/##KypNqvz/PyM/P1vBVkHXLk0nvVrXrkKnsjotukInPboyNra2lqsgp7QYLA2SqNTLTSyorkmsSdSuAMpl5pckQuSqDfT09CqAqhVAxkWDNOmAZGOjDQ10TGP//wcA

Haskell: https://tio.run/##y0gszk7Nyfn/PyM/P1shTSFdoUKhUsEWyKpQ0EhXqNTkKsgpLQZybBVyEwsUNLQrNLky80sSwSLRBnp6FbqGsVy5iZl5QH5BUWZeiYKKAtgssD6wUkMDBdP//wE

point-free Haskell: https://tio.run/##y0gszk7Nyfn/PyM/P1vBViEtJ7NAQU9BQ0NPU0@TqyCntBgomJsIFtPW5MrML0lUqAAKRRvo6VXoGsZy5SZm5gH5BUWZeSUKKgpgY8DawEoNDRRM//8HAA

Lisp: https://tio.run/##RY9BDoMgEEX3nuInXTiTbuyiB0IUazoyBDXV07dgsd0x8PLmYWWcw5u63q0eQdYZtEFmrgDQZII1MR/zJGZqOwPaGXTFhp25PCWeq6pIRl0S1Orqu69FVAOcRni4qBMatL3oCwdSDFZFervAM58xD9UnyGEolrI97z2LEmaNCFyq@Q1DDsuaEEe//O/pEF7q45OXOmcybg3uif0A

Scheme: https://tio.run/##RU27DoMwDNz5ihttVUhl6MTXpMUJUR2CmkaFr09NO@DB8p3vUR6zJOlDjSqtUS3SpzxVlQIqLx9xrH5gxjgi5rfraBIfFwGtWgsWKIOSW0Hq0n1yBoy42COZSZlPw5zzEx6BT@2G3ZDHBgp22nSmj2VVt4P@jl/PUc0YrrgdiYt81CK5tS8

C++: https://tio.run/##XZHPboQgEMbvPsUkTbqQ0s320IvafRHTAyKypAgGIdlN47NbZl2r7gWZP9/8vhHR9@/CcKum6UVbYWIjodRuCF7y7pytORs76bXYpowewjbmRjmvwyXptA3QcW0J/c0AeAwOtAscvqD6Jli0FLACMIQmz3FSmdJn4N4TS4u1hDKSssdaKpzHsOUobYPX06PTyxC9xQrGY7EwexOHlcnZM63euQie26F1viP1SqsX1iZX8XmgSPIF/SaKce@m3nu5OPeTvKAZjF@hZTBf1OLiIaxapmbAlQF@bnTBtOTKFLlRWoz/05928hJXRhrB9Rn@QEo@Tuzzbi/tR@b3yFNnIt/lwsUAZQk6HQc4FGM2TtMf

01:11:43 Oliver Mooney's intro to J: https://youtu.be/t32bIbzQdCU

01:11:43 APL Wiki Learning Resources: https://apl.wiki/Learning_resources

01:13:42 Stephen's website: https://5jt.com