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→History: Remove speculative Dyalog 20.0 reference and consolidate
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[[SHARP APL]] followed A Dictionary of APL and used <code>{</code>, but this was later deprecated, programmers being told to use <code>@</code> instead.<ref>Soliton Associates Limited. SHARP APL for UNIX Language Guide. [https://abrudz.github.io/SAX2/SAX61.pdf#G41.16516 Deprecated Primitives: Braces]. 2000.</ref> | [[SHARP APL]] followed A Dictionary of APL and used <code>{</code>, but this was later deprecated, programmers being told to use <code>@</code> instead.<ref>Soliton Associates Limited. SHARP APL for UNIX Language Guide. [https://abrudz.github.io/SAX2/SAX61.pdf#G41.16516 Deprecated Primitives: Braces]. 2000.</ref> | ||
The name Select and glyph <code>⊇</code> were introduced by [[Extended Dyalog APL]], and subsequently adopted by [[dzaima/APL]] and [[Kap]]. | The name Select and glyph <code>⊇</code> were introduced by [[Extended Dyalog APL]], and subsequently adopted by [[dzaima/APL]] and [[Kap]]. In addition to including it in Extended and the later [[Dyalog APL Vision]], [[Adám Brudzewsky]] described Select as a possible future [[Dyalog APL]] primitive in a presentation at [[Dyalog '22]].<ref>[[Adám Brudzewsky]]. [https://dyalog.tv/Dyalog22/?v=itGiA56NSl8 Filling the Core Language Gaps]. [[Dyalog '22]]. 2022-10-13.</ref> | ||
[[BQN]] uses the name Select like Extended Dyalog APL but takes the direction of the glyph <code>⊏</code>, as well as negative indexing, from J. For a nested left argument it uses a new extension: instead of viewing nesting as elaboration of each element of the left argument, it instead treats it as providing a list of left arguments to select from multiple axes of the right argument. This extension provides the functionality of APL's [[Index (function)|Index]] not by requiring the left argument as a whole to be enclosed but by requiring that each of its elements be an array. | [[BQN]] uses the name Select like Extended Dyalog APL but takes the direction of the glyph <code>⊏</code>, as well as negative indexing, from J. For a nested left argument it uses a new extension: instead of viewing nesting as elaboration of each element of the left argument, it instead treats it as providing a list of left arguments to select from multiple axes of the right argument. This extension provides the functionality of APL's [[Index (function)|Index]] not by requiring the left argument as a whole to be enclosed but by requiring that each of its elements be an array. | ||
== See also == | == See also == | ||