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Eli Barzilay 2013-07-16 03:12:27 -04:00
parent 547a8a6db1
commit d8e722d619
1 changed files with 9 additions and 4 deletions
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@ -128,14 +128,19 @@ my-pet ; => #<dog>
;;; Lists ;;; Lists
;; Lists are linked-list data structures ;; Lists are linked-list data structures, made of `cons' pairs and end
;; with a `null' (or '()) to mark the end of the list
(cons 1 (cons 2 (cons 3 null))) ; => '(1 2 3)
;; `list' is a convenience variadic constructor for lists
(list 1 2 3) ; => '(1 2 3) (list 1 2 3) ; => '(1 2 3)
;; and a quote can also be used for a literal list value
'(1 2 3) ; => '(1 2 3)
;; Use `cons' to add an item to the beginning of a list ;; Can still use `cons' to add an item to the beginning of a list
(cons 4 '(1 2 3)) ; => (4 1 2 3) (cons 4 '(1 2 3)) ; => '(4 1 2 3)
;; Use `append' to add lists together ;; Use `append' to add lists together
(append '(1 2) '(3 4)) ; => (1 2 3 4) (append '(1 2) '(3 4)) ; => '(1 2 3 4)
;;; Vectors ;;; Vectors