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| license = Free for personal use / Proprietary commercial software (free open source implementations exist) | | license = Free for personal use / Proprietary commercial software (free open source implementations exist) | ||
| website = [https://kx.com/ Kx Systems], [https://shakti.com/ Shakti] | | website = [https://kx.com/ Kx Systems], [https://shakti.com/ Shakti] | ||
| documentation = [http://kparc.com/k.txt K4] [https://kparc.github.io/ref/ K9] | | documentation = [http://kparc.com/k.txt K4], [https://kparc.github.io/ref/ K9], [https://k.miraheze.org/ Wiki] | ||
| download = [https://kx.com/connect-with-us/download/ K4], [https://shakti.com/download/ K9] | | download = [https://kx.com/connect-with-us/download/ K4], [https://shakti.com/download/ K9] | ||
| influenced by = [[A+ | | influenced by = [[A+]], [[wikipedia:Scheme_(programming_language)|Scheme]] | ||
| influenced = [[Q]], [[RAD]], [[Kona]], [[Klong]], [[oK]], [[ngn/k]] | | influenced = [[Q]], [[RAD]], [[Kona]], [[Klong]], [[kuc]], [[oK]], [[ngn/k]], [[xs]] | ||
| run online = [https://kparc. | | run online = [https://kparc.com/k/ K9] | ||
}} | }} | ||
'''K''' denotes a family of programming languages designed by [[Arthur Whitney]] and commercialized by Morgan Stanley, Kx Systems, and Shakti. In 1985, while at Morgan Stanley, Whitney created the statically typed A dialect of APL. His colleagues extended A into [[A+]] in 1988. Finally, Whitney presented the first K implementation in 1992, a "reduced instruction set" dialect which only used ASCII [[glyph|glyphs]] and limited arrays to [[list model|(nested) vectors]]. For a long time, K's main role was as implementation languagesfor [[Q]], the query language of kdb+, which is an in-memory, column-based database. K7 (the first "Shakti K") was the first K to have full Unicode support, and it also uses a limited set non-ASCII glyphs in the core language, for example <source lang=apl inline>Ø</source> and <source lang=apl inline>∞</source>, however non-ASCII glyphs were removed in the subsequent K9. | '''K''' denotes a family of programming languages designed by [[Arthur Whitney]] and commercialized by Morgan Stanley, Kx Systems, and Shakti. In 1985, while at Morgan Stanley, Whitney created the statically typed A dialect of APL. His colleagues extended A into [[A+]] in 1988. Finally, Whitney presented the first K implementation in 1992, a "reduced instruction set" dialect which only used ASCII [[glyph|glyphs]] and limited arrays to [[list model|(nested) vectors]]. For a long time, K's main role was as implementation languagesfor [[Q]], the query language of kdb+, which is an in-memory, column-based database. K7 (the first "Shakti K") was the first K to have full Unicode support, and it also uses a limited set non-ASCII glyphs in the core language, for example <source lang=apl inline>Ø</source> and <source lang=apl inline>∞</source>, however non-ASCII glyphs were removed in the subsequent K9. | ||
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== Releases == | == Releases == | ||
See [https://shakti.com/database-software-history/ The Evolution of Database Software]. | See [https://web.archive.org/web/20191202012157/shakti.com/database-software-history/ The Evolution of Database Software]. | ||
{|class=wikitable | {|class=wikitable | ||
! Year | ! Year !! Version | ||
|- | |- | ||
| 1992 | | 1992 || K0 | ||
|- | |- | ||
| 1994 | | 1994 || K1 | ||
|- | |- | ||
| 1996 | | 1996 || K2 | ||
|- | |- | ||
| 2000 | | 2000 || K4 | ||
|- | |- | ||
| unreleased || K5 | | unreleased || K5 | ||
|- | |- | ||
| unreleased || K6 | | unreleased || K6 | ||
|- | |- | ||
| 2018 | | 2018 || K7 (Shakti) | ||
|- | |- | ||
| | | doesn't exist || K8 | ||
|- | |- | ||
| 2020 | | 2020 || K9 (Shakti) | ||
|} | |} | ||
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==External links== | ==External links== | ||
* [https://ngn.bitbucket.io/k.html Overview of K implementations] | * [https://ngn.bitbucket.io/k.html Overview of K implementations] including links to documentation | ||
{{APL dialects}}[[Category:K dialects]] | {{APL dialects}}[[Category:K dialects]] | ||