Del Stile (⍒)

⍒ 𝕩: Grade Down

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Indices of 𝕩 that would sort its major cells in descending order.

    a ← 1‿2‿3

    ⍒ a
⟨ 2 1 0 ⟩

    (⍒a) ⊏ a
⟨ 3 2 1 ⟩

𝕨 ⍒ 𝕩: Bins Down

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Binary search for each cell of 𝕩 in 𝕨, returning the number of major cells in 𝕨 greater than or equal to that cell.

𝕨 must be sorted in descending order.

Right Pervasive.

    7‿5‿4‿3 ⍒ 2
┌·   
· 4  
    ┘

    7‿5‿4‿3 ⍒ 2‿6
⟨ 4 1 ⟩