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• Nest
  .... For example, consider a function which expects one or more English words in uppercase and counts the words that include the letter E. </syntaxhighlight>{{Works in|[[Dyalog APL]]}}
  2 KB (259 words) - 22:22, 10 September 2022
• Materialise
  ...ument is already an array, it is returned unmodified. It is only available in [[Dyalog APL]], which supports classes and .NET objects. Materialise shares </syntaxhighlight>{{Works in|[[Dyalog APL]]}}
  2 KB (233 words) - 21:51, 10 September 2022
• Link
  {{Built-in|Link|⊃}}, or <syntaxhighlight lang=j inline>;</syntaxhighlight> in [[J]], is a [[dyadic]] [[primitive function]] which builds a [[nested]] [[v </syntaxhighlight>{{Works in|[[SHARP APL]]}}
  3 KB (267 words) - 21:02, 10 September 2022
• Partition
  ...length with each element in the left argument corresponding to an element in the right argument. Partition begins a new '''division''' of its right argu {{Works in|[[Dyalog APL]]}}
  3 KB (319 words) - 22:18, 10 September 2022
• Exponential
  {{Built-in|Exponential|*}} is a [[monadic]] [[scalar function]] which computes the [[w </syntaxhighlight>{{Works in|[[Dyalog APL]]}}
  2 KB (241 words) - 22:25, 10 September 2022
• Without
  {{Built-in|Without|~}}, '''Set Difference''', '''Excluding''', or '''Less''', is a [[d ...line>(~X∊Y)/X</syntaxhighlight>. This preserves the order and multiplicity in the left argument. Both arguments can be [[nested array|nested arrays]].
  2 KB (274 words) - 10:58, 11 September 2022
• Prototype
  ...ure of its [[element]]s. It is derived from the first element of the array in [[ravel order]], or, if the array is [[Empty array|empty]], from informatio ...type is used when an array is expanded or when empty elements are inserted in some other way. [[Take]] and [[Expand]] on a [[character]] array produce an
  5 KB (495 words) - 13:28, 24 October 2022
• Factorial
  {{Built-in|Factorial|!}} is a [[monadic]] [[scalar function]] which gives the [[wikipe In multiple implementations, this function has an extended definition using th
  2 KB (289 words) - 21:21, 10 September 2022
• Imaginary
  ...ntaxhighlight> as a monadic counterpart of [[Complex (function)|Complex]]. In other APL implementations that support complex numbers, [[Circular]] with t </syntaxhighlight>{{Works in|[[Extended Dyalog APL]]}}
  2 KB (228 words) - 22:05, 10 September 2022
• Leading axis agreement
  ...The shape of the result is that of the [[argument]] with higher [[rank]]. In J, since all functions, including dyadic scalar functions, have [[function A scalar dyadic function works when the two arrays have the same shape:
  3 KB (413 words) - 18:58, 19 July 2023
• Intersection
  {{Built-in|Intersection|∩}} is a [[dyadic]] [[set function]] which computes the [[wi ...line>(X∊Y)/X</syntaxhighlight>, which preserves the order and multiplicity in the left argument. Both arguments can be [[nested array|nested arrays]].
  2 KB (256 words) - 22:14, 10 September 2022
• Pervasion
  ...the concept of a function being defined in terms of the [[simple scalar]]s in [[nested array]]s. It is a feature of [[Nested array model|nested]] array l ...ntaxhighlight> to reach the simple scalars at the deepest point of nesting in any argument.
  3 KB (387 words) - 21:06, 10 September 2022
• Union
  {{Built-in|Union|∪}} is a [[dyadic]] [[set function]] which computes the [[wikipedia ...ne>X,(~Y∊X)/Y</syntaxhighlight>. This preserves the order and multiplicity in both arguments, the left one taking precedence. Both arguments can be [[nes
  2 KB (256 words) - 17:25, 6 January 2024
• Constant
  ...nded Dyalog APL]], sharing its [[glyph]] with [[Commute]], and was adopted in [[Dyalog APL 18.0]] as an alternative to the constant [[dfn]] such as <synt ...d for Constant arises in various contexts, such as at the rightmost branch in a [[train]] and mapping over an array to create a constant-filled one. The
  3 KB (379 words) - 22:15, 10 September 2022
• Variant
  ...m]. [[APL Quote Quad]], Volume 18, Number 1, 1987-09.</ref>) and '''Fit''' in [[J]], is a special [[dyadic operator]] which takes a function as its left ...r]] when the feature was added, a system operator alternative was provided in form of <syntaxhighlight lang=apl inline>⎕OPT</syntaxhighlight>.
  5 KB (626 words) - 10:43, 11 September 2022
• Natural Logarithm
  {{Built-in|Natural Logarithm|⍟}}, or '''Natural Log''', is a [[monadic]] [[scalar fu </syntaxhighlight>{{Works in|[[Dyalog APL]]}}
  2 KB (251 words) - 21:17, 10 September 2022
• LIMIT ERROR
  ...r whose length along one [[axis]] would exceed the maximum allowed length. In [[Dyalog APL]], the maximum rank is 15, so taking an [[Outer Product]] of t {{Works in|[[Dyalog APL]]}}
  2 KB (230 words) - 22:13, 10 September 2022
• Magnitude
  {{Built-in|Magnitude|<nowiki>|</nowiki>}}, or '''Absolute Value''', is a [[monadic]] [ </syntaxhighlight>{{Works in|[[Dyalog APL]]}}
  2 KB (221 words) - 22:10, 10 September 2022
• Spawn
  {{Built-in|Spawn|&}} is a [[monadic operator]] which applies its [[operand]] in a new [[wikipedia:green thread]]. Rather that returning the result of its o ...xhighlight lang=apl inline>¨</syntaxhighlight>) to launch multiple threads in parallel.
  3 KB (339 words) - 10:46, 11 September 2022
• Reverse Compose
  ...nition matches the [[hook]] function Before, represented as <code>⊸</code> in [[BQN]]. ...xhighlight>{{←→}}<syntaxhighlight lang=apl inline>g⍨∘f⍨</syntaxhighlight>. In [[dzaima/APL]] the monadic case is simply an error.
  3 KB (414 words) - 00:12, 17 March 2024

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