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Extension support
(→History: Version number for APL2 conformability in Dyalog) |
(Extension support) |
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[[A+]] and [[J]] modified Replicate to fit [[leading axis theory]]. Rather than allow Replicate to operate on any axis they have only one Replicate function (in A+, <source lang=apl inline>/</source>; in J, <source lang=j inline>#</source>) which works on the first axis—it copies [[major cell]]s rather than elements. Both languages rejected the [[NARS]] extension to negative left arguments, but J introduced its own system to add [[fill element]]s by allowing [[complex number]]s in the left argument, and removed the [[Expand]] function entirely. [[Arthur Whitney]] went on to make a more radical change in [[K]], removing Replicate entirely in favor of [[Where]]. | [[A+]] and [[J]] modified Replicate to fit [[leading axis theory]]. Rather than allow Replicate to operate on any axis they have only one Replicate function (in A+, <source lang=apl inline>/</source>; in J, <source lang=j inline>#</source>) which works on the first axis—it copies [[major cell]]s rather than elements. Both languages rejected the [[NARS]] extension to negative left arguments, but J introduced its own system to add [[fill element]]s by allowing [[complex number]]s in the left argument, and removed the [[Expand]] function entirely. [[Arthur Whitney]] went on to make a more radical change in [[K]], removing Replicate entirely in favor of [[Where]]. | ||
== Extension support == | |||
Here ">1" refers to the [[SHARP APL]] extension to non-negative integers, while "<0" refers to extension to negative integers in either NARS or APL2 style. | |||
{| class=wikitable | |||
!rowspan=2| Language | |||
!rowspan=2| Type | |||
!rowspan=2 style="min-width:6em"| >1 | |||
!colspan=2| <0 | |||
!rowspan=2| Conformability<br/>extension | |||
!rowspan=2| Axis<br/>specification | |||
!rowspan=2| Notes | |||
|- | |||
! NARS !! APL2 | |||
|- | |||
| [[APL\360]] || Ambiguous || {{No}} ||colspan=2 {{No}} || {{Maybe|Single}} || {{Yes}} || | |||
|- | |||
| [[SHARP APL]] || Operator || {{Yes}} ||colspan=2 {{No}} || {{No|Scalar}} || {{Yes}} || | |||
|- | |||
| [[NARS]] || Function || {{Yes}} || {{Yes}} || {{No}} || {{Maybe|Single}} || {{Yes}} || | |||
|- | |||
| [[Dyalog APL]] || Function || {{Yes}} || {{Yes}} || {{No}} || {{Yes|APL2 (13.1)}} || {{Yes}} || | |||
|- | |||
| [[APL2]] || Function || {{Yes}} || {{No}} || {{Yes}} || {{Yes|APL2}} || {{Yes}} || | |||
|- | |||
| [[A+]] (<source lang=apl inline>/</source>) || Function || {{Yes}} ||colspan=2 {{No}} || {{Maybe|Single}} || {{No}} || | |||
|- | |||
| [[J]] (<source lang=j inline>#</source>) || Function || {{Yes}} ||colspan=2 {{No}} || {{No|Scalar}} || {{No}} || Complex left argument allowed | |||
|- | |||
| [[ISO/IEC 13751:2001]] || Function || {{Yes}} ||colspan=2 {{No}} || {{No|Scalar}} || {{Yes}} || | |||
|- | |||
| [[APLX]] || Function || {{Yes}} || {{Yes}} || {{Yes}} || {{Yes|APL2}} || {{Yes}} || | |||
|- | |||
| [[NARS2000]] || Function || {{Yes}} || {{Yes}} || {{No}} || {{Maybe|Single}} || {{Yes}} || | |||
|- | |||
| [[ngn/apl]] || Function || {{Yes}} || {{Yes}} || {{No}} || {{Yes|APL2}} || {{Yes}} || | |||
|- | |||
| [[GNU APL]] || Function || {{Yes}} || {{No}} || {{Yes}} || {{Yes|APL2}} || {{Yes}} || | |||
|- | |||
| [[dzaima/APL]] (<source lang=apl inline>⌿</source>) || Function || {{Yes}} || {{Yes}} || {{No}} || {{None}} || {{No}} || Vector right argument only | |||
|} | |||
In each language without axis specification, there is only one form of Replicate, which always applies to the first axis or [[major cell]]s—the last-axis form is discarded. | |||
== External Links == | == External Links == | ||