Extended Dyalog APL: Difference between revisions

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Extended Dyalog APL (view source)

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(Add note explaining that the Extended Dyalog is archived and cannot be easily used in Dyalog APL.)
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| run online              = [https://tio.run/#apl-dyalog-extended TIO]
| run online              = [https://tio.run/#apl-dyalog-extended TIO]
}}
}}
'''Extended Dyalog APL''' features extended domains of existing primitives/quad-names and adds a few new ones to [[Dyalog APL]].
'''Extended Dyalog APL''' features extended domains of existing [[primitive]]s and [[quad name]]s and adds a few new ones to [[Dyalog APL]].
It was an experimental project that is no longer maintained. Quoting from project README.md:
It was an experimental project that is no longer maintained. Quoting from project README.md:
<blockquote>This project serves as a breeding ground for ideas. While some have been adopted into Dyalog APL proper, it is unlikely that many will be. Furthermore, Dyalog 18.0 gave a different meaning to monadic ≠ than proposed here, leaving Extended Dyalog APL as a deadend.</blockquote>


''This project serves as a breeding ground for ideas. While some have been adopted into Dyalog APL proper, it is unlikely that many will be. Furthermore, Dyalog 18.0 gave a different meaning to monadic ≠ than proposed here, leaving Extended Dyalog APL as a deadend.''
== Influence ==
Many of the extensions have been adopted into [[dzaima/APL]], while Dyalog APL added [[Constant]] (<syntaxhighlight lang=apl inline>⍨</syntaxhighlight>) and introduced non-experimental [[Case Convert|case conversion]] as a <syntaxhighlight lang=apl inline>⎕C</syntaxhighlight> [[function]] rather than the proposed [[operator]]. Dyalog is also considering adding [[Reverse Compose]], [[From]], and [[Depth (operator)|Depth]].
 
== Features ==
The following extensions were made:
{| class=wikitable
| Name || Glyph || Type* || Extension
|-
| Back Slash || <syntaxhighlight lang=apl inline>\</syntaxhighlight> || 🔶 || <syntaxhighlight lang=apl inline>∘.f</syntaxhighlight>when dyadic, allows short and/or multiple left args
|-
| Back Slash Bar || <syntaxhighlight lang=apl inline>⍀</syntaxhighlight> || 🔶 || <syntaxhighlight lang=apl inline>⊢∘f</syntaxhighlight>when dyadic, allows short and/or multiple left args
|-
| Bullet || <syntaxhighlight lang=apl inline>∙</syntaxhighlight> || 🔺 || Inner product and Alternant
|-
| Circle Diaeresis || <syntaxhighlight lang=apl inline>⍥</syntaxhighlight> || 🔺 || Over and Depth
|-
| Circle Jot || <syntaxhighlight lang=apl inline>⌾</syntaxhighlight> || 🔺 || Complex/Imaginary
|-
| Del Diaeresis || <syntaxhighlight lang=apl inline>⍢</syntaxhighlight> || 🔺 || Under (a.k.a. Dual)
|-
| Del Tilde || <syntaxhighlight lang=apl inline>⍫</syntaxhighlight> || 🔺 || Obverse;<syntaxhighlight lang=apl inline>⍺⍺</syntaxhighlight>but with inverse<syntaxhighlight lang=apl inline>⍵⍵</syntaxhighlight>
|-
| Diaeresis || <syntaxhighlight lang=apl inline>¨</syntaxhighlight> || 🔵 || allows constant operand
|-
| Divide || <syntaxhighlight lang=apl inline>÷</syntaxhighlight> || 🔵 || monadic converts letters to title case when possible
|-
| Dollar Sign || <syntaxhighlight lang=apl inline>$</syntaxhighlight> || 🔺 || string enhancement <code>${1}</code>:<syntaxhighlight lang=apl inline>1⊃⍺</syntaxhighlight>, <code>${expr}</code>:<syntaxhighlight lang=apl inline>⍎expr</syntaxhighlight>,<syntaxhighlight lang=apl inline>\n</syntaxhighlight>:JSON
|-
| Down Arrow || <syntaxhighlight lang=apl inline>↓</syntaxhighlight> || 🔵 || allows long<syntaxhighlight lang=apl inline>⍺</syntaxhighlight>
|-
| Down Shoe || <syntaxhighlight lang=apl inline>∪</syntaxhighlight> || 🔵 || allows rank>1
|-
| Downstile || <syntaxhighlight lang=apl inline>⌊</syntaxhighlight> || 🔵 || monadic lowercases letters
|-
| Down Tack || <syntaxhighlight lang=apl inline>⊤</syntaxhighlight> || 🔶 || 2s as default left argument
|-
| Ellipsis || <syntaxhighlight lang=apl inline>…</syntaxhighlight> || 🔺 || fill sequence gaps ([[dfns workspace]]'s<syntaxhighlight lang=apl inline>to⍤1</syntaxhighlight>
|-
| Epsilon Underbar || <syntaxhighlight lang=apl inline>⍷</syntaxhighlight> || 🔶 || monadic is Type<syntaxhighlight lang=apl inline>∊</syntaxhighlight>with<syntaxhighlight lang=apl inline>⎕ML←0</syntaxhighlight>
|-
| Equals || <syntaxhighlight lang=apl inline>=</syntaxhighlight> || 🔶 || with [[TAO]]; monad: is-type
|-
| Greater Than || <syntaxhighlight lang=apl inline>></syntaxhighlight> || 🔶 || with TAO; monad: is-strictly-negative/is-visible
|-
| Greater Than Or Equal To || <syntaxhighlight lang=apl inline>≥</syntaxhighlight> || 🔶 || with TAO; monad: is non-positive/is-not-control-character
|-
| house || <syntaxhighlight lang=apl inline>⌂</syntaxhighlight> || 🔺 || prefix for contents of [[dfns workspace]]
|-
| infinity || <syntaxhighlight lang=apl inline>∞</syntaxhighlight> || 🔺 || largest integer (for use with<syntaxhighlight lang=apl inline>⍤</syntaxhighlight>and<syntaxhighlight lang=apl inline>⍣</syntaxhighlight>)
|-
| Iota || <syntaxhighlight lang=apl inline>⍳</syntaxhighlight> || 🔵 || Unicode version of [[dfns workspace]]'s <syntaxhighlight lang=apl inline>iotag</syntaxhighlight>
|-
| Iota Underbar || <syntaxhighlight lang=apl inline>⍸</syntaxhighlight> || 🔵 || allows duplicates/non-Booleans
|-
| Iota Underbar Inverse || <syntaxhighlight lang=apl inline>⍸⍣¯1</syntaxhighlight> || 🔵 || given<syntaxhighlight lang=apl inline>r</syntaxhighlight>, finds<syntaxhighlight lang=apl inline>n</syntaxhighlight>so that<syntaxhighlight lang=apl inline>r≡⍸n</syntaxhighlight>
|-
| Jot Diaeresis || <syntaxhighlight lang=apl inline>⍤</syntaxhighlight> || 🔵 || allows constant left operand, Atop with function right operand
|-
| Jot Underbar || <syntaxhighlight lang=apl inline>⍛</syntaxhighlight> || 🔺 || reverse composition<syntaxhighlight lang=apl inline>X f⍛g Y</syntaxhighlight>is<syntaxhighlight lang=apl inline>(f X) g Y</syntaxhighlight>
|-
| Left Shoe || <syntaxhighlight lang=apl inline>⊂</syntaxhighlight> || 🔵 || allows partitioning along multiple trailing axes, with short <syntaxhighlight lang=apl inline>⍺</syntaxhighlight>s, and inserting/appending empty partitions
|-
| Left Shoe Stile || <syntaxhighlight lang=apl inline>⍧</syntaxhighlight> || 🔺 || monad: nub-sieve; dyad: count-in
|-
| Left Shoe With Axis || <syntaxhighlight lang=apl inline>⊂[k]</syntaxhighlight> || 🔵 || as<syntaxhighlight lang=apl inline>⊂</syntaxhighlight>, but called with left operand
|-
| Less Than || <syntaxhighlight lang=apl inline><</syntaxhighlight> || 🔶 || with TAO; monad: is-strictly-positive/is-control-character
|-
| Less Than Or Equal To || <syntaxhighlight lang=apl inline>≤</syntaxhighlight> || 🔶 || with TAO ; monad: is-non-negative/is-invisible
|-
| Minus || <syntaxhighlight lang=apl inline>-</syntaxhighlight> || 🔵 || monadic flips letter case
|-
| macron || <syntaxhighlight lang=apl inline>¯</syntaxhighlight> || 🔵 || as prefix to name or primitive means its inverse
|-
| negative Infinity || <syntaxhighlight lang=apl inline>¯∞</syntaxhighlight> || 🔺 || smallest integer (for use with<syntaxhighlight lang=apl inline>⍣</syntaxhighlight>)
|-
| Nand || <syntaxhighlight lang=apl inline>⍲</syntaxhighlight> || 🔶 || monad: not all equal to type
|-
| Nor || <syntaxhighlight lang=apl inline>⍱</syntaxhighlight> || 🔶 || monad: not any equal to type
|-
| Not Equal To || <syntaxhighlight lang=apl inline>≠</syntaxhighlight> || 🔶 || with TAO; monad: is-non-type
|-
| Percent || <syntaxhighlight lang=apl inline>%</syntaxhighlight> || 🔺 || <syntaxhighlight lang=apl inline>f%</syntaxhighlight>and<syntaxhighlight lang=apl inline>A%</syntaxhighlight>: probability-logical function (mapping arrays)
|-
| Quad Diamond || <syntaxhighlight lang=apl inline>⌺</syntaxhighlight> || 🔶 || auto-extended<syntaxhighlight lang=apl inline>⍵⍵</syntaxhighlight>, allows small<syntaxhighlight lang=apl inline>⍵</syntaxhighlight>, optional edge spec(s) (0:Zero; 1:Repl; 2:Rev; 3:Mirror; 4:Wrap; -:Twist) with masks as operand's<syntaxhighlight lang=apl inline>⍺</syntaxhighlight>
|-
| Question Mark || <syntaxhighlight lang=apl inline>?</syntaxhighlight> || 🔵 || <syntaxhighlight lang=apl inline>⍺?¯⍵</syntaxhighlight>as norm dist stddev <syntaxhighlight lang=apl inline>⍵</syntaxhighlight>and optional mean<syntaxhighlight lang=apl inline>⍺←0</syntaxhighlight>
|-
| Rho || <syntaxhighlight lang=apl inline>⍴</syntaxhighlight> || 🔵 || allows omitting one dimension length with<syntaxhighlight lang=apl inline>¯1</syntaxhighlight>
|-
| Right Shoe Underbar || <syntaxhighlight lang=apl inline>⊇</syntaxhighlight> || 🔺 || monadic discloses if scalar, dyadic indexes sanely
|-
| Right Shoe Underbar With Axis || <syntaxhighlight lang=apl inline>⊇[k]</syntaxhighlight> || 🔺 || as above, but called with left operand
|-
| Root || <syntaxhighlight lang=apl inline>√</syntaxhighlight> || 🔺 || (Square) Root
|-
| Semicolon Underbar || <syntaxhighlight lang=apl inline>⍮</syntaxhighlight> || 🔺 || (Half) Pair; use<syntaxhighlight lang=apl inline>↑⍤⍮</syntaxhighlight>to add axis
|-
| Slash || <syntaxhighlight lang=apl inline>/</syntaxhighlight> || 🔵 || allows short and/or multiple left args
|-
| Slash Bar || <syntaxhighlight lang=apl inline>⌿</syntaxhighlight> || 🔵 || allows short and/or multiple left args
|-
| Star Diaeresis || <syntaxhighlight lang=apl inline>⍣</syntaxhighlight> || 🔵 || allows non-scalar right operand incl.<syntaxhighlight lang=apl inline>∞</syntaxhighlight>and<syntaxhighlight lang=apl inline>¯∞</syntaxhighlight>and array left operand
|-
| Stile || <syntaxhighlight lang=apl inline>|</syntaxhighlight> || 🔵 || monadic normalises letters to lowercase (upper then lower)
|-
| Stile Tilde || <syntaxhighlight lang=apl inline>⍭</syntaxhighlight> || 🔺 || monadic is factors; dyadic depends on<syntaxhighlight lang=apl inline>⍺</syntaxhighlight>: 0=non-prime?, 1=prime?, ¯1=primes less than<syntaxhighlight lang=apl inline>⍵</syntaxhighlight>, ¯2=<syntaxhighlight lang=apl inline>⍵</syntaxhighlight>th prime, 4=next prime, ¯4=prev prime
|-
| Tilde || <syntaxhighlight lang=apl inline>~</syntaxhighlight> || 🔵 || monadic allows probabilities, dyadic allows rank>1
|-
| Tilde Diaeresis || <syntaxhighlight lang=apl inline>⍨</syntaxhighlight> || 🔵 || allows constant operand
|-
| Times || <syntaxhighlight lang=apl inline>×</syntaxhighlight> || 🔵 || set/query letter case (lower:<syntaxhighlight lang=apl inline>¯1</syntaxhighlight>, title:<syntaxhighlight lang=apl inline>0</syntaxhighlight>, upper:<syntaxhighlight lang=apl inline>1</syntaxhighlight>)
|-
| Up Arrow || <syntaxhighlight lang=apl inline>↑</syntaxhighlight> || 🔵 || allows long<syntaxhighlight lang=apl inline>⍺</syntaxhighlight>
|-
| Up Shoe || <syntaxhighlight lang=apl inline>∩</syntaxhighlight> || 🔶 || monadic is self-classify; dyadic allows rank>1
|-
| Upstile || <syntaxhighlight lang=apl inline>⌈</syntaxhighlight> || 🔵 || monadic uppercases letters
|-
| Up Tack || <syntaxhighlight lang=apl inline>⊥</syntaxhighlight> || 🔶 || 2 as default left argument
|-
| Vel || <syntaxhighlight lang=apl inline>∨</syntaxhighlight> || 🔶 || monadic is Descending Sort
|-
| Wedge || <syntaxhighlight lang=apl inline>∧</syntaxhighlight> || 🔶 || monadic is Ascending Sort
|-
| Case Convert || <syntaxhighlight lang=apl inline>⎕C</syntaxhighlight> || 🔺 || <syntaxhighlight lang=apl inline>fn ⎕C</syntaxhighlight>applies case-insensitively,<syntaxhighlight lang=apl inline>array ⎕C</syntaxhighlight>case-folds
|-
| Error Message || <syntaxhighlight lang=apl inline>⎕EM</syntaxhighlight> || 🔺 || Self-inverse<syntaxhighlight lang=apl inline>⎕EM</syntaxhighlight>
|-
| Namespace || <syntaxhighlight lang=apl inline>⎕NS</syntaxhighlight> || 🔵 || allows<syntaxhighlight lang=apl inline>⎕NS names values</syntaxhighlight>(tries to resolve<syntaxhighlight lang=apl inline>⎕OR</syntaxhighlight>s)
|-
| Namespace inverse || <syntaxhighlight lang=apl inline>⎕NS⍣¯1</syntaxhighlight> || 🔺 || allows<syntaxhighlight lang=apl inline>(names values)←⎕NS⍣¯1⊢ns</syntaxhighlight>(returns<syntaxhighlight lang=apl inline>⎕OR</syntaxhighlight>s for ns/fns)
|-
| Unicode Convert || <syntaxhighlight lang=apl inline>⎕UCS</syntaxhighlight> || 🔵 || scalar when monadic
|}
<nowiki>*</nowiki> 🔺 means new feature 🔶 means added valence 🔵 means expanded domain


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