; "Lists can be expressed by function or a quoted form" (= '(1 2 3 4 5) (list 1 2 3 4 5)) ; "They are Clojure seqs (sequences), so they allow access to the first" (= 1 (first '(1 2 3 4 5))) ; "As well as the rest" (= 2 3 4 5 (rest '(1 2 3 4 5))) ;; J - ; "Count your blessings" (= 3 (count '(dracula dooku chocula))) ; "Before they are gone" (= 0 (count '())) ; "The rest, when nothing is left, is empty" (= (rest '(100))) ;; J - returns nothing. ; "Construction by adding an element to the front is easy" (= :a :b :c :d :e (cons :a '(:b :c :d :e))) ;; J - cons add's the element on the left to the beginning ;; of the list on the right and returns a seq. ;;(EX: (cons [1 2] '(3 4 5)) => '([1 2] 3 4 5) ; "Conjoining an element to a list isn't hard either" (= :a :b :c :d :e (conj '(:a :b :c :d) :e)) ;; J - conj works like cons, but takes any number of arguments from ;; the right and adds them to the beginning of the list on the left ;; returning them in the structure of whatever the list on the left is defined ;; as originally. (EX: (conj [4 5 6] 1 2 3) => [1 2 3 4 5 6] ; "You can use a list like a stack to get the first element" (= :a (peek '(:a :b :c :d :e))) ;; J - returns the first element ; "Or the others" (= (:b) (pop '(:a :b :c :d :e))) ;; J - pops the first element and returns the others as a seq ; "But watch out if you try to pop nothing" (= (try ;; J - Catch raises an error similar to 'raise' in Ruby. (pop '()) (catch IllegalStateException e "No dice!"))) ; "The rest of nothing isn't so strict" (= () (try (rest '()) (catch IllegalStateException e "No dice!")))