Up Down Arrow (↕)

↕ 𝕩: Range

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Return all indices that would index into an array of shape 𝕩.

When given a single number, range from 0 to 𝕩-1.

↗️
    ↕ 4
⟨ 0 1 2 3 ⟩

    ↕ 4‿5
┌─                                         
╵ ⟨ 0 0 ⟩ ⟨ 0 1 ⟩ ⟨ 0 2 ⟩ ⟨ 0 3 ⟩ ⟨ 0 4 ⟩  
  ⟨ 1 0 ⟩ ⟨ 1 1 ⟩ ⟨ 1 2 ⟩ ⟨ 1 3 ⟩ ⟨ 1 4 ⟩  
  ⟨ 2 0 ⟩ ⟨ 2 1 ⟩ ⟨ 2 2 ⟩ ⟨ 2 3 ⟩ ⟨ 2 4 ⟩  
  ⟨ 3 0 ⟩ ⟨ 3 1 ⟩ ⟨ 3 2 ⟩ ⟨ 3 3 ⟩ ⟨ 3 4 ⟩  
                                          ┘

𝕨 ↕ 𝕩: Windows

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Overlapping slices from 𝕩 of shape 𝕨.

↗️
    5 ↕ "abcdefg"
┌─       
╵"abcde  
  bcdef  
  cdefg" 
        ┘

    a ← 3‿3⥊↕9

    2‿2 ↕ a
┌─     
┆ 0 1  
  3 4  
       
  1 2  
  4 5  
       
       
  3 4  
  6 7  
       
  4 5  
  7 8  
      ┘