Laminate: Difference between revisions

{{Built-in|Laminate|,[0.5]}} is a case of the [[Catenate]] function [[function axis|with axis]] that joins its argument arrays along a new length-2 [[axis]]. It applies whenever the function axis is non-integral, but is typically written with a half-integer axis. Possible choices of axis range from <syntaxhighlight lang=apl inline>,[⎕IO-0.5]</syntaxhighlight>, which places the new axis before any argument axis, to <syntaxhighlight lang=apl inline>,[r+⎕IO-0.5]</syntaxhighlight>, where <syntaxhighlight lang=apl inline>r</syntaxhighlight> is the shared argument [[rank]], which places it after all argument axes. Laminate appears as a stand-alone function in some languages, with the name Laminate in [[A+]] (<syntaxhighlight lang=apl inline>~</syntaxhighlight>) and [[J]] (<syntaxhighlight lang=j inline>,:</syntaxhighlight>), and Couple in [[BQN]] (<code>≍</code>) and [[Uiua]] (<code>⊟</code>). These languages implement the <syntaxhighlight lang=apl inline>,[⎕IO-0.5]</syntaxhighlight> case only, as the [[Rank operator]] can be used to add the axis in a later position, in accordance with [[leading axis theory]].

== Examples ==

* [https://www.uiua.org/docs/couple Uiua]

{{APL built-ins}}[[Category:Primitive functions]][[Category:Leading axis theory]]