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(SHARP eventually extended Disclose to pad like J does now) |
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[[APL2]], released in 1984, used the same name Disclose as SHARP APL but introduced the glyph [[Right Shoe]] (<syntaxhighlight lang=apl inline>⊃</syntaxhighlight>). It shared NARS's [[function axis]] definition, but extended the function to allow argument elements with different [[shape]]s as long as they had the same [[rank]]. Arrays with different shapes would be padded using [[fill element]]s as with [[Take]] to bring them to a common shape large enough to contain every element. | [[APL2]], released in 1984, used the same name Disclose as SHARP APL but introduced the glyph [[Right Shoe]] (<syntaxhighlight lang=apl inline>⊃</syntaxhighlight>). It shared NARS's [[function axis]] definition, but extended the function to allow argument elements with different [[shape]]s as long as they had the same [[rank]]. Arrays with different shapes would be padded using [[fill element]]s as with [[Take]] to bring them to a common shape large enough to contain every element. | ||
A further extension was | A further extension was added to SHARP APL in 1989,<ref>[[IPSA]]. [https://archive.org/details/sharp-apl-release-20.0-guide-for-apl-programmers "SHARP APL Release 20.0: Guide for APL Programmers"].</ref> and featured in [[J]] as a consequence of its definition of the [[Rank operator]]. In J, result arrays in a function applied with rank can have different [[rank]]s, and results with lower rank are brought to a common rank by adding leading 1s to the shape. This change was taken up by [[Dyalog APL]] in [[Dyalog APL 14.0|version 14.0]], which introduced [[Rank (operator)|Rank]] following J's definition, in order to make Mix and Rank consistent. However, Dyalog differs from J in that it permits [[mixed array]]s, so while in J an array containing a mix of numbers, characters, and boxes cannot be mixed, in Dyalog any array at all can be mixed. | ||
== Language support == | == Language support == | ||
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| [[NARS]] || Mix || <code>↑</code> || [[Shape]] || {{Yes}} || {{No}} | | [[NARS]] || Mix || <code>↑</code> || [[Shape]] || {{Yes}} || {{No}} | ||
|- | |- | ||
| | | [[A+]], SHARP <19.0 || Disclose || <code>></code> || [[Shape]] and type || {{No}} || {{No}} | ||
|- | |||
| [[SHARP APL]] || Disclose || <code>></code> || Type || {{No}} || {{No}} | |||
|- | |- | ||
| [[APL2]], [[APLX]] || Disclose || <code>⊃</code> || [[Rank]] || {{No}} || {{Yes}} | | [[APL2]], [[APLX]] || Disclose || <code>⊃</code> || [[Rank]] || {{No}} || {{Yes}} |