4,494
edits
APL Campfire: Difference between revisions
Jump to navigation
Jump to search
m
→2021
m (Text replacement - "</source>" to "</syntaxhighlight>") |
m (→2021) |
||
| Line 29: | Line 29: | ||
| Oct 24 || [[Jim Brown]], Ron Murray || Early days at [[IBM]] and [[Syracuse University]]. Discussions with [[Ken Iverson]] and [[Adin Falkoff]], extending [[decode|base value]] (<syntaxhighlight lang=apl inline>⊥</syntaxhighlight>) and [[Encode|represent]] (<syntaxhighlight lang=apl inline>⊤</syntaxhighlight>) to work on higher [[rank]] arrays. Ragged [[array]]s vs [[nested array]]s. <syntaxhighlight lang=apl inline>⎕AX</syntaxhighlight> as prototyping too; to switch axiom system for enclosing a scalar. Origin of [[wikipedia:foo|foo]] as a placeholder name in programming. Resistance to APL at IBM. Interesting internal applications at IBM: a stock application (still in use today) and QMF (Query Management Facility). Using APL for models of [[primitive]]s and extensions. Behaviour of [[outer product]] (<syntaxhighlight lang=apl inline>∘.</syntaxhighlight>), [[strand notation]], [[prototype]]s for [[each]] on [[empty array]]s, [[system label]]s. [[NARS2000]]'s ball arithmetic. Differences in floating point results of APL vs [[wikipedia:PL/I|PL/I]] implementations of IBM's internal planning system. The meaning of [[monadic]] [[Up Arrow]] (<syntaxhighlight lang=apl inline>↑</syntaxhighlight>) and [[Right Shoe]] (<syntaxhighlight lang=apl inline>⊃</syntaxhighlight>). Influence from [[wikipedia:Lisp (programming language)|Lisp]] ([[first]] as <syntaxhighlight lang=apl inline>↑</syntaxhighlight> and "last" as <syntaxhighlight lang=apl inline>↓</syntaxhighlight>), symbols, Mike Jenkins's [[Matrix Inverse]] and [[Matrix Divide]] (<syntaxhighlight lang=apl inline>⌹</syntaxhighlight>), Disjoined arrays using a dedicated Disjoined Array Computer (DAC), hardware [[APL machine]]s/processors, [[shared variable]]s. || [https://www.youtube.com/watch?v=eFtO_vtCNEw&t=259s&list=PLYKQVqyrAEj91hZHbJiWOENHZP4JT8VFv 1:26:13] | | Oct 24 || [[Jim Brown]], Ron Murray || Early days at [[IBM]] and [[Syracuse University]]. Discussions with [[Ken Iverson]] and [[Adin Falkoff]], extending [[decode|base value]] (<syntaxhighlight lang=apl inline>⊥</syntaxhighlight>) and [[Encode|represent]] (<syntaxhighlight lang=apl inline>⊤</syntaxhighlight>) to work on higher [[rank]] arrays. Ragged [[array]]s vs [[nested array]]s. <syntaxhighlight lang=apl inline>⎕AX</syntaxhighlight> as prototyping too; to switch axiom system for enclosing a scalar. Origin of [[wikipedia:foo|foo]] as a placeholder name in programming. Resistance to APL at IBM. Interesting internal applications at IBM: a stock application (still in use today) and QMF (Query Management Facility). Using APL for models of [[primitive]]s and extensions. Behaviour of [[outer product]] (<syntaxhighlight lang=apl inline>∘.</syntaxhighlight>), [[strand notation]], [[prototype]]s for [[each]] on [[empty array]]s, [[system label]]s. [[NARS2000]]'s ball arithmetic. Differences in floating point results of APL vs [[wikipedia:PL/I|PL/I]] implementations of IBM's internal planning system. The meaning of [[monadic]] [[Up Arrow]] (<syntaxhighlight lang=apl inline>↑</syntaxhighlight>) and [[Right Shoe]] (<syntaxhighlight lang=apl inline>⊃</syntaxhighlight>). Influence from [[wikipedia:Lisp (programming language)|Lisp]] ([[first]] as <syntaxhighlight lang=apl inline>↑</syntaxhighlight> and "last" as <syntaxhighlight lang=apl inline>↓</syntaxhighlight>), symbols, Mike Jenkins's [[Matrix Inverse]] and [[Matrix Divide]] (<syntaxhighlight lang=apl inline>⌹</syntaxhighlight>), Disjoined arrays using a dedicated Disjoined Array Computer (DAC), hardware [[APL machine]]s/processors, [[shared variable]]s. || [https://www.youtube.com/watch?v=eFtO_vtCNEw&t=259s&list=PLYKQVqyrAEj91hZHbJiWOENHZP4JT8VFv 1:26:13] | ||
|- | |- | ||
| Nov 21 || Zbigniew "Ziggy" Stachniak<ref>Computing historian, associate professor of computer science at York University in Toronto, and author of [https://www.google.co.uk/books/edition/Inventing_the_PC/cyWOA2FED7EC?hl=en Inventing the PC].</ref>, [[CoSy|Bob Armstrong]] || Timeline leading to [[MCM/70]]:[[wikipedia:Mers Kutt]], [[York APL]], [[wikipedia:Intel 8008|Intel 8008]], [[APL '73]], [https://www.youtube.com/watch?v=AaQdzKnOxJE speed of <syntaxhighlight lang=apl inline>0.7÷⍳255</syntaxhighlight>], battery-operation, European tour and selling [https://www.youtube.com/watch?v=tcxXxAxxL5I the computer as a personal calculator], users of MCM/70, [[IBM]] possible "inspiration" to create the [[APL 5100|IBM 5100]], the display technology, the applications libraries including [https://www.youtube.com/watch?v=YitUfJySYz4 games], [https://museum.eecs.yorku.ca/ York University Computer Museum], using APL for arts, [https://museum.eecs.yorku.ca/mcm70e the MCM/70 emulator]. || [https://www.youtube.com/watch?v=QA9XymS-vho&list=PLYKQVqyrAEj91hZHbJiWOENHZP4JT8VFv 1:09:21] | | Nov 21 || Zbigniew "Ziggy" Stachniak<ref>Computing historian, associate professor of computer science at York University in Toronto, and author of [https://www.google.co.uk/books/edition/Inventing_the_PC/cyWOA2FED7EC?hl=en Inventing the PC].</ref>, [[CoSy|Bob Armstrong]] || Timeline leading to [[MCM/70]]: [[wikipedia:Mers Kutt|Mers Kutt]], [[York APL]], [[wikipedia:Intel 8008|Intel 8008]], [[APL '73]], [https://www.youtube.com/watch?v=AaQdzKnOxJE speed of <syntaxhighlight lang=apl inline>0.7÷⍳255</syntaxhighlight>], battery-operation, European tour and selling [https://www.youtube.com/watch?v=tcxXxAxxL5I the computer as a personal calculator], users of MCM/70, [[IBM]] possible "inspiration" to create the [[APL 5100|IBM 5100]], the display technology, the applications libraries including [https://www.youtube.com/watch?v=YitUfJySYz4 games], [https://museum.eecs.yorku.ca/ York University Computer Museum], using APL for arts, [https://museum.eecs.yorku.ca/mcm70e the MCM/70 emulator]. || [https://www.youtube.com/watch?v=QA9XymS-vho&list=PLYKQVqyrAEj91hZHbJiWOENHZP4JT8VFv 1:09:21] | ||
|- | |- | ||
| Dec 19 || [[Charles Brenner]] || [[Larry Breed]], [[wikipedia:Roger Moore (computer scientist)|Roger Moore]], [[IBM]] at [[wikipedia:Yorktown Heights, New York|Yorktown Heights]], [[Ken Iverson]]'s [[A Programming Language]], [[Adin Falkoff]], [[Eugene McDonnell]], [[APL\360]], implementing (high-rank) [[Transpose]] and [[Rotate]] with APL models, [[wikipedia:Imlac PDS-1|Imlac]], [[APL\1130]], the [[wikipedia:modem|modem]] precursor, generating poetry by sampling trigrams, [[STSC]], [[Roy Sykes]], optimised transpose of [[Boolean]] arrays, [[Bob Bernecky]], [[wikipedia:John Gilmore (activist)|John Gilmore]], [[control structure]]s, [[APL00|APL2000]], [[John Scholes]], [[Roger Hui]], [[IPSA]], [[dfns.dws]], [[wikipedia:IBM 650|IBM 650]], uses of APL, forensic mathematics, [[Adrian Smith]] || [https://www.youtube.com/watch?v=mmEtMrBikT0&list=PLYKQVqyrAEj91hZHbJiWOENHZP4JT8VFv 1:13:16] | | Dec 19 || [[Charles Brenner]] || [[Larry Breed]], [[wikipedia:Roger Moore (computer scientist)|Roger Moore]], [[IBM]] at [[wikipedia:Yorktown Heights, New York|Yorktown Heights]], [[Ken Iverson]]'s [[A Programming Language]], [[Adin Falkoff]], [[Eugene McDonnell]], [[APL\360]], implementing (high-rank) [[Transpose]] and [[Rotate]] with APL models, [[wikipedia:Imlac PDS-1|Imlac]], [[APL\1130]], the [[wikipedia:modem|modem]] precursor, generating poetry by sampling trigrams, [[STSC]], [[Roy Sykes]], optimised transpose of [[Boolean]] arrays, [[Bob Bernecky]], [[wikipedia:John Gilmore (activist)|John Gilmore]], [[control structure]]s, [[APL00|APL2000]], [[John Scholes]], [[Roger Hui]], [[IPSA]], [[dfns.dws]], [[wikipedia:IBM 650|IBM 650]], uses of APL, forensic mathematics, [[Adrian Smith]] || [https://www.youtube.com/watch?v=mmEtMrBikT0&list=PLYKQVqyrAEj91hZHbJiWOENHZP4JT8VFv 1:13:16] | ||