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GNU APL (view source)

Revision as of 12:28, 22 February 2024

1,690 bytes added ,  22 February
Numeric types
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| index origin            = 0 or 1
| index origin            = 0 or 1
| function styles          = [[tradfn]], [[dfn]] (limited)
| function styles          = [[tradfn]], [[dfn]] (limited)
| numeric types            = [[complex]] floats, rational
| numeric types            = [[complex]] float, 64-bit integer
| unicode support          = full
| unicode support          = full
| released                = 2013
| released                = 2013
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| documentation            = [https://www.gnu.org/software/apl/apl.html info manual]
| documentation            = [https://www.gnu.org/software/apl/apl.html info manual]
| influenced by            = [[APL2]], [[Dyalog APL]]
| influenced by            = [[APL2]], [[Dyalog APL]]
| run online              = [http://juergen-sauermann.de/try-GNU-APL try-GNU-APL]
}}
}}
{| class=wikitable style="float:right;max-width:33%"
|{{quote | "Both 32-and 64-bit GNU APL are available for Windows, truly proving G_d is great! الله أكبر"|Alan G. Konheim. [https://sites.cs.ucsb.edu/~konheim/Feistel%20Talk%20-2Final.pdf ''Creativity in Computer Science – Horst Feistel'']. Footnote 14. Page F-9.}}
|}
'''GNU APL''' is a free and (almost) complete implementation of Extended APL as specified in [[ISO/IEC 13751:2001]] and is thus similar to [[APL2]]. It was initially written and is being maintained by Jürgen Sauermann. It includes extensions such as [[complex number]]s and a shared variable interface.
'''GNU APL''' is a free and (almost) complete implementation of Extended APL as specified in [[ISO/IEC 13751:2001]] and is thus similar to [[APL2]]. It was initially written and is being maintained by Jürgen Sauermann. It includes extensions such as [[complex number]]s and a shared variable interface.


In addition to a normal local APL [[session]], GNU APL can be scripted, and has an experimental online version.
In addition to a normal local APL [[session]], GNU APL can used in a "scripting" language fashion by processing linear scripts passed to the interpreter at startup. It can also be compiled into a shared loadable library for embedding the interpreter into other projects.


Documents on GNU APL sometimes quote [[Richard Stallman]], who both founded GNU and programmed in APL. However, Stallman is not directly associated with the project.
Documents on GNU APL sometimes quote [[Richard Stallman]], who both founded GNU and programmed in APL. However, Stallman is not directly associated with the project.
[[File:GNU APL.png|thumb|left|GNU APL's online demo, [http://juergen-sauermann.de/try-GNU-APL try-GNU-APL]]]
 
== Encoding ==
== Encoding ==


GNU APL tends to prefer the [[Unicode]] ''Lozenge'' (U+25CA; <source lang=apl inline>◊</source>) and ''Element of'' (U+2208; <source lang=apl inline>∈</source>) over ''Diamond operator'' (U+22C4; <source lang=apl inline>⋄</source>) and ''Small Element of'' (U+220A; <source lang=apl inline>∊</source>) which are more commonly used by other dialects. This can lead to [[SYNTAX ERROR]]s if attempting to use code written for GNU APL in other implementations. However, GNU APL also accepts the more common code points.
GNU APL tends to prefer the [[Unicode]] ''Lozenge'' (U+25CA; <syntaxhighlight lang=apl inline>◊</syntaxhighlight>) and ''Element of'' (U+2208; <syntaxhighlight lang=apl inline>∈</syntaxhighlight>) over ''Diamond operator'' (U+22C4; <syntaxhighlight lang=apl inline>⋄</syntaxhighlight>) and ''Small Element of'' (U+220A; <syntaxhighlight lang=apl inline>∊</syntaxhighlight>) which are more commonly used by other dialects. This can lead to [[SYNTAX ERROR]]s if attempting to use code written for GNU APL in other implementations. However, GNU APL also accepts the more common code points.
 
== Numeric types ==
 
GNU APL supports both 64-bit floats and 64-bit integers, as well as complex numbers whose components are floating-point. The integer type is used when a value can be conveniently determined to have an integer value, in particular when a primitive that is "integer by nature" is called on integer arguments and the result is not too large (GNU reserves a region at the boundary of the 64-bit range where results may be either integer or float).<ref>GNU APL documentation §3.1, [https://www.gnu.org/software/apl/apl.html#System-Limits System Limits]. Accessed 2024-02-22.</ref> Monadic function <syntaxhighlight lang=apl inline>⊤∨</syntaxhighlight> converts near-integer floating-point values to the integer type. Experimental support for rationals, which are ratios of 64-bit integers, can be enabled at compile time.
 
== External links ==
* [http://www.gnu.org/software/apl The GNU APL Homepage]
* [http://lists.gnu.org/archive/html/bug-apl/ The GNU APL Mailing List]
* [http://www.gnu.org/software/apl/apl.html The GNU APL Info Manual]
* [http://svn.savannah.gnu.org/viewvc/apl/ GNU APL Sources (Subversion)]
* [https://savannah.gnu.org/svn/?group=apl Help for GNU APL Subversion]
* [http://www.gnu.org/software/apl/Community.html The GNU APL Community]


== References ==
<references/>
{{APL dialects}}[[Category:APL dialects]][[Category:Nested array languages]]
{{APL dialects}}[[Category:APL dialects]][[Category:Nested array languages]]
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