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This wiki is all about APL, an [https://en.wikipedia.org/wiki/Array_programming array-oriented programming language]. It has a powerful, concise [[syntactic overview|syntax]] that lets you develop shorter programs that enable you to think more about the problem you're trying to solve rather than how to express it to a computer.  
{| style="border-spacing: 1ex;"
| style="background:#f9f9f9;border:1px solid #ddd;" colspan="2" |
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| style="width:50%;text-align:center;" | <span style="font-size:xx-large">Welcome to [[APL Wiki]],</span><br>
[[Special:Statistics|{{NUMBEROFARTICLES}}]] articles about APL that anyone can edit.<br>
See the [[overview|navigational overview]] of content.
| [[File:APL logo.png|48px|link=APL logo]]
| [[The name APL|'''APL''']] is an [[wikipedia:Array_programming|array-oriented programming language]]. Its natural, concise [[APL syntax|syntax]] lets you develop shorter programs while thinking more about the problem you're trying to solve than how to express it to a computer.  
|}


== Running APL ==
|- style="vertical-align:top"
{{Main|Running APL}}
| style="background:#f5fffa;border:1px solid #cef2e0;padding:0 1em" |
<h2 style="margin:.75em 0; background:#cef2e0; font-family:inherit; font-size:120%; font-weight:bold; border:1px solid #a3bfb1; color:#000; padding:0.2em 0.4em;">Running APL</h2>
Traditionally a commercial language, quite a few implementations are now free without feature limitations, several can be tried online, and many are [[List of open-source array languages|open source]].


Traditionally a commercial language, there are now quite a few APL dialects available to download for free without feature limitations, and most of these can be tried online without installing anything.
<p style="text-align:center">'''[[Running APL]] ∙ [https://tryapl.org/ Try APL online]'''</p>


== Introduction to APL ==
| style="background:#f5faff;border:1px solid #cee0f2;padding:0 1em" |
<h2 style="margin:0.75em 0; background:#cedff2; font-family:inherit; font-size:120%; font-weight:bold; border:1px solid #a3b0bf; color:#000; padding:0.2em 0.4em;>Hello world</h2>


Taking up APL can ba a daunting tasks, but a few introductory guides have been created to help in the process:
Taking up a new programming language can be a daunting task. While it can appear cryptic at first, you can learn to [[semantic density|read]], write and [[mnemonics|remember]] APL with little effort. There is plenty of material to help you in the process.


[[I am new to programming]]
<p style="text-align:center">'''[[Introductions]] ∙ [[Learning resources]] ∙ [[Blogs]] ∙ [[Podcasts]] ∙ [[Videos]]'''</p>
|- style="vertical-align:top"
| style="background:#faf5ff;border:1px solid #e0cef2;padding:0 1em" |
<h2 style="margin:0.75em 0; background:#ddcef2; font-family:inherit; font-size:120%; font-weight:bold; border:1px solid #afa3bf; color:#000; padding:0.2em 0.4em">Who uses it?</h2>
APL is used by both hobbyists and application developers. There are active [[user groups and meetups]] online and all around the globe. There are also multiple online [[chat rooms and forums]].


[[I am a programmer but new to APL]]
<p style="text-align:center">'''[[Case studies]] ∙ [[Job listings]] ∙ [[Conferences]]'''</p>


[[Intermediate APL | I want to learn intermediate APL]]
| style="background:#fff5fa;border:1px solid #f2cee0;padding:0 1em" |
<h2 style="margin:0.75em 0; background:#f2cedd; font-family:inherit; font-size:120%; font-weight:bold; border:1px solid #bfa3af; color:#000; padding:0.2em 0.4em">Contributing</h2>
[[APL_Wiki:About|APL Wiki]] is an online open-content [[wikipedia:wiki|wiki]]; that is, a voluntary association of individuals and groups working to develop a common knowledge resource. The structure of the project allows anyone with an Internet connection to alter [[APL_Wiki:Content_guidelines|its content]].
<p style="text-align:center">'''[[Help:Contributing|How to contribute]] ∙ [[Special:NewPages|New pages]] ∙ [[Special:WantedPages| Wanted pages]]'''</p>
|-


[[Modern APL for old APLers | I'm an old APLer who wants to learn modern APL]]
| colspan="2" style="border:1px solid #e2e2e2;padding:0 1em" |
 
<h2 style="margin:0.75em 0; background:#eeeeee; border:1px solid #ddd; color:#222; padding:0.2em 0.4em; font-size:120%; font-weight:bold; font-family:inherit;">Examples</h2>
== Who uses APL? ==
APL's terseness means that substantial programs are expressible in a small space, relative to many other programming languages. Below are just a taste. Many more, and fully explained, examples are in the [[simple examples]] article.
There are many [[case studies]] of both hobby and real-world APL applications.
=== Split text by delimiter ===
 
With the introduction of [[tacit programming]], many functions can be expressed in fewer characters than even the shortest fitting name. For example <syntaxhighlight lang=apl inline>≠⊆⊢</syntaxhighlight> is but three characters, while you would need five for the name <code>Split</code>:
There is a popular [[APL Orchard|APL chat room on Stack Exchange]].


There are active [[:Category:user groups|user groups]] all around the globe, many of these hold regular in-person meet-ups.
[https://tryapl.org/?a=%27%2C%27%28%u2260%u2286%u22A2%29%27comma%2Cdelimited%2Ctext%27&run Try it now!]
 
<syntaxhighlight lang=apl>
== Examples ==
{{Main|Examples}}
 
APL's terseness means that substantial programs are expressable in a small space, relative to many other programming languages. Here are some examples:
=== Split text by delimiter ===
<pre class=apl>
       ','(≠⊆⊢)'comma,delimited,text'
       ','(≠⊆⊢)'comma,delimited,text'
┌─────┬─────────┬────┐
┌─────┬─────────┬────┐
│comma│delimited│text│
│comma│delimited│text│
└─────┴─────────┴────┘
└─────┴─────────┴────┘
</pre>
</syntaxhighlight>
{{Works in|[[Dyalog APL]], [[dzaima/APL]], [[NARS2000]], [[ngn/apl]]}}
{{Works in|[[Dyalog APL]]}}
'''[[Simple examples#Split text by delimiter|Full explanation…]]'''


=== Conway's "Game of Life" ===
=== Conway's "Game of Life" ===
[[John Scholes]] is famous for the following implementation of Conway's "Game of Life":
[[John Scholes]] is famous for the following implementation of ''[[Conway's Game of Life]]'':
<pre class=apl>
 
[https://tryapl.org/?clear&q=%E2%8E%95%E2%86%90world%E2%86%902%202%202%202%E2%8A%A40%2012%205%202%204%201%20%E2%8B%84%20%E2%86%93%20%E2%8B%84%20%7B%E2%86%911%20%E2%8D%B5%E2%88%A8.%E2%88%A73%204%3D%2B%2F%2C%C2%AF1%200%201%E2%88%98.%E2%8A%96%C2%AF1%200%201%E2%88%98.%E2%8C%BD%E2%8A%82%E2%8D%B5%7D%20world&run Try it now!]
<syntaxhighlight lang=apl>
       ⎕←world←2 2 2 2⊤0 12 5 2 4 1
       ⎕←world←2 2 2 2⊤0 12 5 2 4 1
0 1 0 0 0 0
0 1 0 0 0 0
Line 52: Line 69:
0 1 0 1 1 0
0 1 0 1 1 0
0 0 1 0 0 0
0 0 1 0 0 0
</pre>
</syntaxhighlight>
{{Works in|[[Dyalog APL]], [[dzaima/APL]], [[GNU APL]], [[NARS2000]], [[ngn/apl]]}}
{{Works in|[[Dyalog APL]], [[ngn/apl]]}}
'''[[John Scholes' Conway's Game of Life|Full article…]]'''


{{APL programming language}}
<p style="text-align:center">'''[[Simple examples|Further simple examples]] ∙ [[Advanced examples]]'''</p>
{{APL community}}
|}

Latest revision as of 15:16, 8 August 2024


Welcome to APL Wiki,

458 articles about APL that anyone can edit.
See the navigational overview of content.

APL logo.png APL is an array-oriented programming language. Its natural, concise syntax lets you develop shorter programs while thinking more about the problem you're trying to solve than how to express it to a computer.

Running APL

Traditionally a commercial language, quite a few implementations are now free without feature limitations, several can be tried online, and many are open source.

Running APL ∙ Try APL online

Hello world

Taking up a new programming language can be a daunting task. While it can appear cryptic at first, you can learn to read, write and remember APL with little effort. There is plenty of material to help you in the process.

Introductions ∙ Learning resources ∙ Blogs ∙ Podcasts ∙ Videos

Who uses it?

APL is used by both hobbyists and application developers. There are active user groups and meetups online and all around the globe. There are also multiple online chat rooms and forums.

Case studies ∙ Job listings ∙ Conferences

Contributing

APL Wiki is an online open-content wiki; that is, a voluntary association of individuals and groups working to develop a common knowledge resource. The structure of the project allows anyone with an Internet connection to alter its content.

How to contribute ∙ New pages ∙ Wanted pages

Examples

APL's terseness means that substantial programs are expressible in a small space, relative to many other programming languages. Below are just a taste. Many more, and fully explained, examples are in the simple examples article.

Split text by delimiter

With the introduction of tacit programming, many functions can be expressed in fewer characters than even the shortest fitting name. For example ≠⊆⊢ is but three characters, while you would need five for the name Split:

Try it now! 

      ','(≠⊆⊢)'comma,delimited,text'
┌─────┬─────────┬────┐
│comma│delimited│text│
└─────┴─────────┴────┘
Works in: Dyalog APL

Full explanation…

Conway's "Game of Life"

John Scholes is famous for the following implementation of Conway's Game of Life:

Try it now! 

      ⎕←world←2 2 2 2⊤0 12 5 2 4 1
0 1 0 0 0 0
0 1 1 0 1 0
0 0 0 1 0 0
0 0 1 0 0 1
      {↑1 ⍵∨.∧3 4=+/,¯1 0 1∘.⊖¯1 0 1∘.⌽⊂⍵} world
1 1 0 1 0 0
0 1 1 1 0 0
0 1 0 1 1 0
0 0 1 0 0 0
Works in: Dyalog APL, ngn/apl

Full article…

Further simple examples ∙ Advanced examples

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