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•   works on non-scalar arrays which are all real numbers or all characters
compares major cells item-wise in ravel order (lexicographic ordering)
uses exact comparisons (as if 0=⎕ct)

   x← ↑ 'three' 'two' 'one' 'Zero'

   x            x[⍋x;]          ⍋x
three        Zero            3 2 0 1
two          one  
one          three
Zero         two  

   ⍋ 'three' 'two' 'one' 'Zero'            ⍋ 2j¯1 2 2j3
DOMAIN ERROR                            DOMAIN ERROR
   ⍋'three' 'two' 'one' 'Zero'             ⍋2J¯1 2 2J3
  ∧                                       ∧