Solidus (/)

/ 𝕩: Indices

Repeat the index of each element in 𝕩 by the element's value. 𝕩 must be rank 1.

       / 1‿2‿3
⟨ 0 1 1 2 2 2 ⟩

       / 1‿0‿1
⟨ 0 2 ⟩

𝕨 / 𝕩: Replicate

Repeat each major cell in 𝕩 by the corresponding element in 𝕨.

Atomic 𝕨 applies to all elements.

       3 / "copy"
"cccooopppyyy"

       1‿0‿1 / 1‿2‿3
⟨ 1 3 ⟩