Circled Horizontal Bar With Notch (⎉)

𝔽⎉𝕘 𝕩, 𝕨 𝔽⎉𝕘 𝕩: Rank

Apply 𝔽 to cells at ranks given in 𝕘.

The ranks applied are given by the following:

• ⎉ c Rank-c cells of 𝕩 (monadic) or both arguments (dyadic)
• ⎉ b‿c ⍝ Rank-b cells of 𝕨 and rank-c cells of 𝕩 (dyadic)
• ⎉ a‿b‿c ⍝ Rank-a cells of 𝕩 (monadic), b-cells of 𝕨 and c-cells of 𝕩 (dyadic)

       a ← 3‿2‿4⥊"ABCDEFGHIJKLMNOPQRSTUVWXYZ"

       ⌽⎉2 a
┌─      
╎"EFGH  
  ABCD  
        
 ·MNOP  
  IJKL  
        
 ·UVWX  
  QRST" 
       ┘