array-dimensions
array ⇒ dimensions
Returns a list of the dimensions of array. (If array is a vector with a fill pointer, that fill pointer is ignored.)
(array-dimensions (make-array 4)) ⇒ (4)
(array-dimensions (make-array '(2 3))) ⇒ (2 3)
(array-dimensions (make-array 4 :fill-pointer 2)) ⇒ (4)
Should signal an error of type type-error if its argument is not an array.