Dyalog APL

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Revision as of 16:17, 11 November 2019 by Miraheze>Adám Brudzewsky (13.2)
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Dyalog APL, or simply Dyalog, is a modern APL in the APL2 tradition, first released by British company Dyadic Systems Ltd. (now Dyalog Ltd.) in 1983 for the Zylog Z80 processor (the name Dyalog is a portmanteau of Dyadic and Zylog). Dyalog supports several platforms and interfaces with many languages and runtimes including native shared libraries, .NET, the JVM, R, and Python. It is actively developed and has introduced many new primitives and concepts to array programming. Major categories of features introduced to APL by Dyalog are tacit programming by allowing named derived functions and later trains, lexically-scoped functional programming using dfns, namespaces and object-oriented programming, and the addition of leading axis theory and the Rank operator to the nested array paradigm.

In 1995, two Dyalog developers—John Scholes and Peter Donnelly—were awarded the Iverson Award for their work on the interpreter. Gitte Christensen and Morten Kromberg were joint recipients of the Iverson Award in 2016.

Versions

Dyalog lists historical versions, along with release notes since 14.0, on its website.

Number Year Month Features
1 1983 April Assignment for derived functions
2 1984
3.0 1985
4.0 1986 October
5.0 1987 April
5.1 1988 April
5.2 1990 January
6.0 1990 April Namespaces with dot syntax
6.1 1990 October
6.2 1993 April
6.3 1993 October
7.0 1994 August
7.1 1995 May Keywords (If/Then/Else, Repeat/Until, exception handling, and so on)
8.0 1996 May dfns with lexical scope
8.1 1997 March
8.2 1999 January
9.0 2000 September
9.0.1 2001 January
9.0.2 2002 January
9.5 2002 September
10.0 2003 March
10.1 2004 July
11.0 2006 October Object oriented programming (classes, objects, interfaces) modelled after C#, Index (), Power operator (), GCD (), LCM ()
12.0 2008 August Unicode support (⎕AVU, ⎕UCS), ⎕FCOPY, ⎕FPROPS
12.1 2009 November I-Beam (), Table (), ⎕XML, ⎕FCHK, User commands
13.0 2011 April Left (), Right (), Variant (), ⎕OPT, ⎕R, ⎕S, ⎕PROFILE, ⎕RSI, complex number and decimal float support, short arguments for Take, Drop, and Index (, , )
13.1 2012 April ⎕DMX, ⎕FHIST
13.2 2013 January Array Editor
14.0 2014 June Trains, Tally (), Key (), Rank operator (), multi-threading with futures and isolates
14.1 2015 June
15.0 2016 June ⎕MKDIR, ⎕NDELETE, ⎕NEXISTS, ⎕NGET, ⎕NINFO, ⎕NPARTS, ⎕NPUT
16.0 2017 June At (@), Interval Index (), Where (), Nest (), Partition (), Stencil (), ⎕JSON, ⎕CSV
17.0 2018 July ⎕NCOPY, ⎕NMOVE
17.1 2019 October Duplicates in Interval Index () look-up array
18.0 Unreleased Atop (), Over (), Constant (), Unique Mask ()

Primitives

Functions

Glyph Monadic Dyadic
+ Conjugate Plus
- Negate Minus
× Signum Times
÷ Reciprocal Divide
| Magnitude Residue
Floor Minimum
Ceiling Maximum
* Exponential Power
Natural Logarithm Logarithm
! Factorial Binomial
Pi Times Circular
~ Not Without
? Roll Query
And
Or
Nand
Nor
< Less
Less Or Equal
= Equal
Greater Or Equal
> Greater
Unique Mask Not Equal
Shape Reshape
, Ravel Catenate
Table Catenate First
Reverse Rotate
Reverse First Rotate First
Transpose
Mix/Disclose Take
Split Drop
Enclose Partitioned Enclose
Nest Partition
Enlist/Type Membership
Disclose/Mix Pick
/ Replicate
Replicate First
\ Expand
Expand First
Intersection
Unique Union
Same Left
Same Right
Index Generator Index Of
Where Interval Index
Grade Down
Grade Up
Find
Depth Match
Tally Not Match
Execute
Format
Base
Represent
Matrix Inverse Matrix Divide
Materialise Squad Indexing

Operators

Syntax Monadic call Dyadic call
f/ Reduction Windowed Reduction
f⌿ Reduction First Windowed Reduction First
f\ Scan
f⍀ Scan First
Each
f⍨ Commute
A⍨ Constant
f⍣v Power
f.g Inner Product
∘.f Outer Product
A∘g Bind
f∘B
f∘g Beside
f⍤B Rank
f⍤g Atop
f⍥g Over
f@v At
f⍠B Variant
f⌸ Key
f⌺B Stencil
A⌶ I-Beam
f& Spawn
f[B] Axis

External links

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