Commute: Difference between revisions

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#REDIRECT [[Tilde Diaeresis]]
{{Built-in|Commute|⍨}} is a [[Primitive function|primitive]] [[monadic]] [[operator]] that takes a [[function]] on its left and returns a new function with swapped arguments.
 
== Examples ==
 
<source lang=apl>
 
</source>
 
== External links ==
 
=== Lessons ===
 
* [https://chat.stackexchange.com/transcript/52405?m=40900200#40900200 APL Cultivation]
 
=== Documentation ===
 
* [http://help.dyalog.com/latest/index.htm#Language/Primitive%20Operators/Commute.htm Dyalog]
* [http://microapl.com/apl_help/ch_020_020_400.htm APLX]
* J [https://www.jsoftware.com/help/dictionary/d121.htm Dictionary], [https://code.jsoftware.com/wiki/Vocabulary/minusdot NuVoc]
 
{{APL built-ins}}

Revision as of 06:55, 26 April 2020

⍨

Commute (⍨) is a primitive monadic operator that takes a function on its left and returns a new function with swapped arguments.

Examples



External links


Lessons



Documentation











APL built-ins [edit]




Primitives (Timeline)
Functions




Scalar




Monadic

Conjugate ∙ Negate ∙ Signum ∙ Reciprocal ∙ Magnitude ∙ Exponential ∙ Natural Logarithm ∙ Floor ∙ Ceiling ∙ Factorial ∙ Not ∙ Pi Times ∙ Roll ∙ Type ∙ Imaginary ∙ Square Root ∙ Round




Dyadic

Add ∙ Subtract ∙ Times ∙ Divide ∙ Residue ∙ Power ∙ Logarithm ∙ Minimum ∙ Maximum ∙ Binomial ∙ Comparison functions ∙ Boolean functions (And, Or, Nand, Nor) ∙ GCD ∙ LCM ∙ Circular ∙ Complex ∙ Root




Non-Scalar




Structural

Shape ∙ Reshape ∙ Tally ∙ Depth ∙ Ravel ∙ Enlist ∙ Table ∙ Catenate ∙ Reverse ∙ Rotate ∙ Transpose ∙ Raze ∙ Mix ∙ Split ∙ Enclose ∙ Nest ∙ Cut (K) ∙ Pair ∙ Link ∙ Partitioned Enclose ∙ Partition




Selection

First ∙ Pick ∙ Take ∙ Drop ∙ Unique ∙ Identity ∙ Stop ∙ Select ∙ Replicate ∙ Expand ∙ Set functions (Intersection ∙ Union ∙ Without) ∙ Bracket indexing ∙ Index ∙ Cartesian Product ∙ Sort




Selector

Index generator ∙ Grade ∙ Index Of ∙ Interval Index ∙ Indices ∙ Deal ∙ Prefix and suffix vectors




Computational

Match ∙ Not Match ∙ Membership ∙ Find ∙ Nub Sieve ∙ Encode ∙ Decode ∙ Matrix Inverse ∙ Matrix Divide ∙ Format ∙ Execute ∙ Materialise ∙ Range




Operators
Monadic

Each ∙ Commute ∙ Constant ∙ Replicate ∙ Expand ∙ Reduce ∙ Windowed Reduce ∙ Scan ∙ Outer Product ∙ Key ∙ I-Beam ∙ Spawn ∙ Function axis ∙ Identity (Null, Ident)




Dyadic

Bind ∙ Compositions (Compose, Reverse Compose, Beside, Withe, Atop, Over) ∙ Inner Product ∙ Determinant ∙ Power ∙ At ∙ Under ∙ Rank ∙ Depth ∙ Variant ∙ Stencil ∙ Cut ∙ Direct definition (operator) ∙ Identity (Lev, Dex)




Quad names

Index origin ∙ Comparison tolerance ∙ Migration level ∙ Atomic vector



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