fill [Function]

fill sequence item {&key start end} => sequence

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::

section replace [Function] , nsubstitute

Notes::

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

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