Right Shoe

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The glyph right shoe is a an oval missing its left side (resembling the top-down view of a horseshoe pointing to the right) represented by the Unicode character , "superset of". The right shoe has several uses in various dialects:

  • In SHARP APL, <source lang=apl inline>⊃</syntaxhighlight> is Nest when monadic and Link when dyadic.
  • In APL2, NARS2000, GNU APL, and APLX, <source lang=apl inline>⊃</syntaxhighlight> is Mix when monadic.
  • In Dyalog APL, dzaima/APL, and ngn/apl, <source lang=apl inline>⊃</syntaxhighlight> is First when monadic.
  • In A+, <source lang=apl inline>⊃</syntaxhighlight> is Raze when monadic.
  • In all nested APLs as well as A+, <source lang=apl inline>⊃</syntaxhighlight> is Pick when dyadic.
  • In NARS2000, <source lang=apl inline>⊃</syntaxhighlight> becomes Superset when used dyadically as operand of the Multiset operator (<source lang=apl inline>⍦</syntaxhighlight>).

In the context of nested APLs, monadic <source lang=apl inline>⊃</syntaxhighlight> is often called Disclose in symmetry of <source lang=apl inline>⊂</syntaxhighlight> (Left Shoe) being Enclose. However, as this name is ambiguous, the names First and Mix are to be preferred.


APL glyphs [edit]
Information GlyphTyping glyphs (on Linux) ∙ UnicodeFontsMnemonicsOverstrikesMigration level
Individual glyphs Jot () ∙ Right Shoe () ∙ Up Arrow () ∙ Zilde () ∙ High minus (¯) ∙ Dot (.) ∙ Del ()