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added adjustable vectors

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Goheeca 2013-08-20 17:58:33 +02:00
parent 424fc8ce80
commit edf839bfae
1 changed files with 18 additions and 1 deletions
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common-lisp.html.markdown
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@ -219,7 +219,7 @@ nil ; for false - and the empty list
;;; Vectors
;; Vectors are fixed-length arrays
;; Vector's literals are fixed-length arrays
#(1 2 3) ; => #(1 2 3)
;; Use concatenate to add vectors together
@ -253,6 +253,23 @@ nil ; for false - and the empty list
; => 0
;;; Adjustable vectors
;; Adjustable vectors have the same printed representation
;; as fixed-length vector's literals.
(defparameter *adjvec* (make-array '(3) :initial-contents '(1 2 3)
:adjustable t :fill-pointer t))
*adjvec* ; => #(1 2 3)
;; Adding new element:
(vector-push-extend 4 *adjvec*) ; => 3
*adjvec* ; => #(1 2 3 4)
;;; Naively, sets are just lists:
(set-difference '(1 2 3 4) '(4 5 6 7)) ; => (3 2 1)