Lists

ClojureScript Koans Lists Answers
http://clojurescriptkoans.com/#lists/1


1)Lists can be expressed by function or a quoted form

(= '(  1 2 3 4 5  ) (list 1 2 3 4 5))

2)They are Clojure seqs (sequences), so they allow access to the first

(=  1  (first '(1 2 3 4 5)))

3)As well as the rest

(=  '(2 3 4 5)  (rest '(1 2 3 4 5)))

4)Count your blessings

(=  3  (count '(dracula dooku chocula)))

5)Before they are gone

(=  0  (count '()))

6)The rest, when nothing is left, is empty

(=  '()  (rest '(100)))

7)Construction by adding an element to the front is easy

(=  '(:a :b :c :d :e)  
   (cons :a '(:b :c :d :e)))

8)Conjoining an element to a list is strikingly similar

(=  '(:a :b :c :d :e)  
   (conj '(:b :c :d :e) :a))

9)You can use a list like a stack to get the first element

(=  :a  (peek '(:a :b :c :d :e)))

10)Or the others

(=  '(:b :c :d :e)  (pop '(:a :b :c :d :e)))