Beside: Difference between revisions

Beside (view source)

797 bytes added , 10:18, 6 September 2021

→‎Examples: should be monadic

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 In usage, <source lang=apl inline>X f∘g Y</source> is equivalent to <source lang=apl inline>X f g Y</source>, and <source lang=apl inline>f∘g Y</source> is equivalent to <source lang=apl inline>f g Y</source>. Thus, beside can be defined as the [[dop]] <source lang=apl inline>{⍺←⊢ ⋄ ⍺ ⍺⍺ ⍵⍵ ⍵}</source>.
+== Examples ==
+When used [[monadic]]ally, <source lang=apl inline>f∘g</source> behaves the same as an [[atop]]:
+<source lang=apl>
+      -∘÷ 2
+¯0.5
+      ⍝ same as
+      -(÷2)
+¯0.5
+</source>
+When used [[dyadic]]ally, <source lang=apl inline>f∘g</source> forms a dyadic [[hook]]:
+<source lang=apl>
+      'oy'≡∘⌽'yo'
+      ⍝ same as
+      'oy'≡⌽'yo'
+</source>
+When used monadically with [[Commute]], <source lang=apl inline>f∘g</source> forms a monadic [[hook]]:
+<source lang=apl>
+      ≡∘⌽⍨'UwU'
+      ⍝ same as this, because operators are left-associative, unlike functions which are right-associative
+      (≡∘⌽)⍨'UwU'
+      ⍝ same as
+      'UwU'≡⌽'UwU'
+</source>
 == External links ==
@@ Line 11: / Line 44: @@
 === Documentation ===
-* [http://help.dyalog.com/18.0/#Language/Primitive%20Operators/Beside.htm Dyalog]
+* [https://help.dyalog.com/18.0/#Language/Primitive%20Operators/Beside.htm Dyalog]
-{{APL built-ins}}
+{{APL built-ins}}[[Category:Primitive operators]][[Category:Composition operators]]