Dyalog APL: Difference between revisions

| released                = 1983

| developer                = [[Dyalog Ltd.]]

| implementation languages = [[wikipedia:C (programming language)|C]], [[wikipedia:C++|C++]], APL

| platforms                = x86, x86_64, IBM POWER, ARM32

| operating systems        = Windows, Linux, macOS, AIX

| license                  = Free for personal use / Proprietary commercial software

| download                = [https://www.dyalog.com/download-zone.htm Non-commercial download]

| forum                    = [https://forums.dyalog.com/ Dyalog Forums]

| run online              = [https://tryapl.org/ TryAPL]

}}

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Although it initially received very little commercial interest, Dyalog has steadily grown in prominence and in the 2010s has been the basis of several new APL dialects including [[ngn/apl]], [[APL\iv]], and [[dzaima/APL]]. Even in APLs not derived from Dyalog such as [[GNU APL]] and [[NARS2000]], [[dfn]]-style function syntax has become common, and Dyalog has also popularised [[SHARP APL]] and [[J]] innovations such as the [[Rank operator]] and [[train]]s among nested APLs.

Released at [[APL83]], Dyalog sold very few copies due to the lack of interest in either Unix or the nested array model. Subsequent sales were also limited, with only a single licence sold through Zilog partly due to the Z8000's limited popularity. Supported by Dyadic's APL consulting and later by sales of Unix hardware, Scholes and Streeter continued work on Dyalog by porting it to a wide variety of Unix systems in response to requests from users; in 1995, Scholes was awarded the [[Iverson Award]] jointly with [[Peter Donnelly]] for his work on the Dyalog interpreter. Although it continued to run significant losses every year, Dyalog slowly acquired users during the 1980s, including current client [[wikipedia:SimCorp|SimCorp]]. In 1991, Dyadic hired [[John Daintree]] to begin work on the <source lang=apl inline>⎕WC</source> graphical user interface for [[wikipedia:Microsoft Windows|Microsoft Windows]]; Dyalog for Windows debuted at [[APL92]] and quickly become Dyalog's main platform.<ref name="taylor"/>

In the 2010s, Dyalog development began to focus on performance, which had been improved out of necessity in early releases but had not been a major focus. In 2010 Dyalog Ltd. hired [[Jay Foad]], a compiler developer who initially created a bytecode compiler for APL and later improved performance in other ways, and served as CTO from 2016 until his departure in 2019. In 2011 the company hired [[Roger Hui]], developer of [[J]], and in 2016 it also hired J programmer and language implementor [[Marshall Lochbaum]]. Both developers improved performance of Dyalog's primitives on flat arrays, and brought concepts such as the [[Rank operator]], [[train]]s, and composition operators [[Atop]] and [[Over]] from J to APL.

| [[Dyalog_APL_versions#17.1|17.1]]  || 2019 || October  || Duplicates in [[Interval Index]] (<source lang=apl inline>⍸</source>) look-up array

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| <source lang=apl inline>⌹</source> || [[Matrix Inverse]]    || [[Matrix Divide]]

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| <source lang=apl inline>A⍨</source>  ||colspan=2| [[Constant]]

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| <source lang=apl inline>f.g</source>  ||                    || [[Inner Product]]

* [https://tio.run/#apl-dyalog Try It Online]

* [https://dyalog.com Download]

{{APL dialects}}[[Category:Dyalog APL| ]][[Category:APL dialects]][[Category:Nested array languages]][[Category:Leading axis languages]][[Category:Languages with tacit programming]][[Category:.NET]]