Mix: Difference between revisions

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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.

A further extension was ~~introduced as a consequence of~~ [[J]]'s 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.

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 ==

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| [[NARS]] || Mix || <code>↑</code> || [[Shape]] || {{Yes}} || {{No}}

|-

| ~~[[SHARP APL]],~~ [[A+]] || Disclose || <code>></code> || [[Shape]] and type || {{No}} || {{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}}

@@ Line 35: / Line 35: @@
 [[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 introduced as a consequence of [[J]]'s 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.
+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 ==
@@ Line 46: / Line 46: @@
 | [[NARS]]                         || Mix      || <code>↑</code> || [[Shape]]          || {{Yes}} || {{No}}
 |-
-| [[SHARP APL]], [[A+]]            || Disclose || <code>></code> || [[Shape]] and type || {{No}}  || {{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}}

Mix: Difference between revisions

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