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(Reference for catenate over enclose in 1981) |
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{{Built-in|Pair|⍮}} or '''Juxtapose''' is a [[primitive function]] equivalent to the [[dfn]] < | {{Built-in|Pair|⍮}} or '''Juxtapose''' is a [[primitive function]] equivalent to the [[dfn]] <syntaxhighlight lang=apl inline>{⍺←,⊂ ⋄ ⍺ ⍵}</syntaxhighlight> which aids in constructing nested arrays during [[tacit programming]] where [[stranding]] by juxtaposition is not available. It is also equivalent to the [[catenate|catenation]] of the [[enclose]]d arguments; <syntaxhighlight lang=apl inline>,⍥⊂</syntaxhighlight> using the [[Over]] [[operator]]<ref>[https://www.jsoftware.com/papers/satn41.htm "Composition and Enclosure"] § | ||
Composition Operators. SATN-41, 1981-06-20.</ref> or < | Composition Operators. SATN-41, 1981-06-20.</ref> or <syntaxhighlight lang=apl inline>,⍨∘⊂⍨∘⊂</syntaxhighlight> using only the traditional operators [[Commute]] and [[Compose]]. It was introduced in [[Extended Dyalog APL]], and then adopted into [[dzaima/APL]]. | ||
== Common usage == | == Common usage == | ||
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[https://tio.run/##SyzI0U2pSszMTfz//1Hf1EdtE8wUzBUsNLQf9a7T1TT@/x8A Try it online!] | [https://tio.run/##SyzI0U2pSszMTfz//1Hf1EdtE8wUzBUsNLQf9a7T1TT@/x8A Try it online!] | ||
< | <syntaxhighlight lang=apl> | ||
6 7 8(+⍮-)3 | 6 7 8(+⍮-)3 | ||
┌───────┬─────┐ | ┌───────┬─────┐ | ||
│9 10 11│3 4 5│ | │9 10 11│3 4 5│ | ||
└───────┴─────┘ | └───────┴─────┘ | ||
</ | </syntaxhighlight> | ||
{{Works in|[[dzaima/APL]], [[Extended Dyalog APL]]}} | {{Works in|[[dzaima/APL]], [[Extended Dyalog APL]]}} | ||
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[https://tio.run/##SyzI0U2pSszMTfz//1Hf1EdtE8wUzBUsNLQftU181LvkUe86XU3j//8B Try it online!] | [https://tio.run/##SyzI0U2pSszMTfz//1Hf1EdtE8wUzBUsNLQftU181LvkUe86XU3j//8B Try it online!] | ||
< | <syntaxhighlight lang=apl> | ||
6 7 8(+↑⍤⍮-)3 | 6 7 8(+↑⍤⍮-)3 | ||
9 10 11 | 9 10 11 | ||
3 4 5 | 3 4 5 | ||
</ | </syntaxhighlight> | ||
{{Works in|[[dzaima/APL]], [[Extended Dyalog APL]]}} | {{Works in|[[dzaima/APL]], [[Extended Dyalog APL]]}} | ||