fill (Function)

Syntax:

Arguments and Values:

sequence—a proper sequence.

item—a sequence.

start, end—bounding index designators of sequence. The defaults for start and end are 0 and nil, respectively.

Description:

Replaces the elements of sequence bounded by start and end with item.

Examples:

 (fill (list 0 1 2 3 4 5) '(444)) → ((444) (444) (444) (444) (444) (444))
 (fill (copy-seq "01234") #\e :start 3) → "012ee"
 (setq x (vector 'a 'b 'c 'd 'e)) → #(A B C D E)
 (fill x 'z :start 1 :end 3) → #(A Z Z D E)
 x → #(A Z Z D E)
 (fill x 'p) → #(P P P P P)
 x → #(P P P P P)

Side Effects:

Sequence is destructively modified.

Exceptional Situations:

Should be prepared to signal an error of type type-error if sequence is not a proper sequence. Should signal an error of type type-error if start is not a non-negative integer. Should signal an error of type type-error if end is not a non-negative integer or nil.

See Also:

replace, nsubstitute

Notes:

(fill sequence item) ≡ (nsubstitute-if item (constantly t) sequence)