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== Haven't used APL in a while? ==
== Haven't used APL in a while? ==
Those who learned APL "in the early days" should note that several implementations have made significant extensions to the language and system in the last decade or two.
Those who learned APL "in the early days" should note that several implementations have made significant extensions to the language and system in the last decade or two.
 
<div style="column-width:40em">
* General video: [https://www.youtube.com/watch?v=XN1l1WiYc_o Dyalog APL for other APL users] ([[assignment]], [[control structure]]s, [[namespace]]s, [[migration level]], [[Bind]], [[user-defined operator]]s, [[dfn]]s, [[Error trapping with Dyalog APL|error trapping]], [[shyness]], [[namelist]]s, [[GCD]], [[LCM]], [[Power (operator)|Power operator]], and more)
'''General'''
 
* [https://www.youtube.com/watch?v=XN1l1WiYc_o Dyalog APL for other APL users] (video)
* New primitive functions: <syntaxhighlight lang=apl inline>⊢</syntaxhighlight> [[Identity|Same]], [[Right_identity|Right]]; <syntaxhighlight lang=apl inline>⊣</syntaxhighlight> [[Identity|Same]], [[Left_identity|Left]]; <syntaxhighlight lang=apl inline>⌷</syntaxhighlight> [[Materialise]], [[Squad indexing|Index]]; <syntaxhighlight lang=apl inline>≡</syntaxhighlight> [[Depth]], [[Match]]; <syntaxhighlight lang=apl inline>≢</syntaxhighlight> [[Tally]], [[Not Match]]; <syntaxhighlight lang=apl inline>≠</syntaxhighlight> [[Nub Sieve]]; <syntaxhighlight lang=apl inline>⍸</syntaxhighlight> [[Where]], [[Interval Index]]; <syntaxhighlight lang=apl inline>⊆</syntaxhighlight> [[Nest]], [[Partition]]
* [[Assignment]]
 
* [[Control structure]]s
* New primitive operators: <syntaxhighlight lang=apl inline>⍨</syntaxhighlight> [[Commute]], [[Constant]]; <syntaxhighlight lang=apl inline>@</syntaxhighlight> [[At]]; <syntaxhighlight lang=apl inline>∘</syntaxhighlight> [[Bind]], [[Beside]]; <syntaxhighlight lang=apl inline>⍤</syntaxhighlight> [[Atop (operator)|Atop]], [[Rank]];  <syntaxhighlight lang=apl inline>⍥</syntaxhighlight> [[Over]];  <syntaxhighlight lang=apl inline>⍤</syntaxhighlight> [[Rank operator|Rank]]; <syntaxhighlight lang=apl inline>⌸</syntaxhighlight> [[Key]]; <syntaxhighlight lang=apl inline>⌺</syntaxhighlight> [[Stencil]]; <syntaxhighlight lang=apl inline>⍠</syntaxhighlight> [[Variant]]; <syntaxhighlight lang=apl inline>&</syntaxhighlight> [[Spawn]]
* [[Namespace]]s
 
* [[Migration level]]
* Lambdas ([[dfn]]s): [https://help.dyalog.com/16.0/Content/Language/Defined%20Functions%20and%20Operators/DynamicFunctions/Dynamic%20Functions%20and%20Operators.htm Intro]; [https://help.dyalog.com/latest/Content/Language/Defined%20Functions%20and%20Operators/DynamicFunctions/MultiLine%20Dynamic%20Functions.htm Details]; [https://help.dyalog.com/latest/Content/Language/Defined%20Functions%20and%20Operators/DynamicFunctions/Dynamic%20Operators.htm Operators]; [https://dfns.dyalog.com/n_contents.htm The dfns workspace] (collection of categorized utilities with extensive comments and notes)
* [[User-defined operator]]s
 
* [[Error trapping with Dyalog APL|Error trapping]]
* [[Tacit programming]]: [[Dyalog APL]] documentation: [https://help.dyalog.com/16.0/Content/RelNotes14.0/Function%20Trains.htm Intro]; [https://help.dyalog.com/latest/Content/Language/Introduction/Trains.htm Details]; [https://www.youtube.com/watch?v=kt4lMZbn-so short video]; [https://www.youtube.com/watch?v=A2LqqBosvY0 long video]; [https://chat.stackexchange.com/rooms/52405/conversation/lesson-23-transcribing-to-and-reading-trains APL Cultivation lesson]; [[Function composition]]
* [[Shyness]]
 
* [[Namelist]]s
* Other features and concepts: [[Keyword]]s; [[Object-oriented programming]]; [[namespace]]s; [[Total array ordering]]; [[Leading axis theory]]; [[Complex number]]s
* [[Keyword]]s
 
* [[Object-oriented programming]]
* [[Total array ordering]]
* [[Leading axis theory]]
* [[Complex number]]s
'''New primitive functions'''
* [[GCD]] and [[LCM]]
* [[Identity|Same]] (<syntaxhighlight lang=apl inline>⊢</syntaxhighlight> and <syntaxhighlight lang=apl inline>⊣</syntaxhighlight>)
* [[Materialise]] and [[Squad indexing|Index]] (<syntaxhighlight lang=apl inline>⌷</syntaxhighlight>)
* [[Depth]] and [[Match]] (<syntaxhighlight lang=apl inline>≡</syntaxhighlight>)
* [[Tally]] and [[Not Match]] (<syntaxhighlight lang=apl inline>≢</syntaxhighlight>)
* [[Nub Sieve]] (<syntaxhighlight lang=apl inline>≠</syntaxhighlight>)
* [[Where]] and [[Interval Index]] (<syntaxhighlight lang=apl inline>⍸</syntaxhighlight>)
* [[Nest]] and [[Partition]] (<syntaxhighlight lang=apl inline>⊆</syntaxhighlight>)
'''New primitive operators'''
* [[Power (operator)|Power operator]]
* [[Commute]] and [[Constant]] (<syntaxhighlight lang=apl inline>⍨</syntaxhighlight>)
* [[At]] (<syntaxhighlight lang=apl inline>@</syntaxhighlight>)
* [[Bind]] and [[Beside]] (<syntaxhighlight lang=apl inline>∘</syntaxhighlight>)
* [[Atop (operator)|Atop]] and [[Rank]] (<syntaxhighlight lang=apl inline>⍤</syntaxhighlight>)
* [[Over]] (<syntaxhighlight lang=apl inline>⍥</syntaxhighlight>)
* [[Key]] (<syntaxhighlight lang=apl inline>⌸</syntaxhighlight>)
* [[Stencil]] (<syntaxhighlight lang=apl inline>⌺</syntaxhighlight>)
* [[Variant]] (<syntaxhighlight lang=apl inline>⍠</syntaxhighlight>)
* [[Spawn]] (<syntaxhighlight lang=apl inline>&</syntaxhighlight>)
'''Lambdas ([[dfn]]s)'''
* [https://help.dyalog.com/latest/Content/Language/Defined%20Functions%20and%20Operators/DynamicFunctions/Dynamic%20Functions%20and%20Operators.htm Intro]
* [https://help.dyalog.com/latest/Content/Language/Defined%20Functions%20and%20Operators/DynamicFunctions/MultiLine%20Dynamic%20Functions.htm Details]
* [https://help.dyalog.com/latest/Content/Language/Defined%20Functions%20and%20Operators/DynamicFunctions/Dynamic%20Operators.htm Operators]
* [https://dfns.dyalog.com/n_contents.htm The dfns workspace] (collection of categorized utilities with extensive comments and notes)
'''[[Tacit programming]]'''
* [https://help.dyalog.com/16.0/Content/RelNotes14.0/Function%20Trains.htm Intro]
* [https://help.dyalog.com/latest/Content/Language/Introduction/Trains.htm Details]
* [https://www.youtube.com/watch?v=kt4lMZbn-so Short video]
* [https://www.youtube.com/watch?v=A2LqqBosvY0 Long video]
* [https://chat.stackexchange.com/rooms/52405/conversation/lesson-23-transcribing-to-and-reading-trains APL Cultivation lesson]
* [[Function composition]]
</div>
{{APL development}}[[Category:Lists]][[Category:Resources]]
{{APL development}}[[Category:Lists]][[Category:Resources]]
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