Over: Difference between revisions
Jump to navigation
Jump to search
(Created page with "{{BuiltinOver<nowiki>⍥</nowiki>}} is a dyadic operator which takes two functions and produce a function (<source lang=apl inline>⍥</source>). == Explanati...") 
mNo edit summary 

Line 21:  Line 21:  
9  9  
</source>  </source>  
{{APL builtins}}[[Category:Primitive operators]][[Category:Composition operators]] 
Revision as of 12:35, 9 September 2021
⍥

Over (⍥
) is a dyadic operator which takes two functions and produce a function (⍥
).
Explanation
When the resulting function is used monadically, it is the same as Atop.
(g ⍥ h) ⍵

g (h ⍵)

When the resulting function is used dyadically, then it forms an Over expression (which is the true purpose of this operator).
⍺ (g ⍥ h) ⍵

(h ⍺) g (h ⍵)

Examples
x←1 2 3
y←4 5 6
x +⍥(⌈/) y ⍝ add the max of x and max of y
9
⍝ same as
(⌈/x)+⌈/y
9