array-in-bounds-p array &rest subscripts → generalized-boolean

array — an array.

subscripts — a list of integers of length equal to the rank of the array.

generalized-boolean — a generalized boolean.

Returns true if the subscripts are all in bounds for array; otherwise returns false. (If array is a vector with a fill pointer, that fill pointer is ignored.)

(setq a (make-array '(7 11) :element-type 'string-char)) 
(array-in-bounds-p a 0  0) → true 
(array-in-bounds-p a 6 10) → true 
(array-in-bounds-p a 0 -1) → false 
(array-in-bounds-p a 0 11) → false 
(array-in-bounds-p a 7  0) → false

array-dimensions

(array-in-bounds-p array subscripts) 
≡ (and (not (some #'minusp (list subscripts))) 
        (every #'< (list subscripts) (array-dimensions array)))