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*View this file with results and syntax highlighting [here](https://mlochbaum.github.io/BQN/help/⍒gradedown binsdown.html).*
# Del Stile (`⍒`)
`⍒ 𝕩`: Grade Down
Indices of `𝕩` that would sort its major cells in descending order.
a ← 1‿2‿3
⟨ 1 2 3 ⟩
⍒ a
⟨ 2 1 0 ⟩
(⍒a) ⊏ a
⟨ 3 2 1 ⟩
`𝕨 ⍒ 𝕩`: Bins Down
Binary search for each element of `𝕩` in `𝕨`, and return the index found, if any.
`𝕨` must be sorted in descending order.
[Right Pervasive.](https://mlochbaum.github.io/BQN/doc/arithmetic.html#pervasion)
7‿5‿4‿3 ⍒ 2
┌·
· 4
┘
7‿5‿4‿3 ⍒ 2‿6
⟨ 4 1 ⟩
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