adding about lists

koans/about_lists.clj

@@ -0,0 +1,34 @@
+(meditations
+  "Lists can be expressed by function or a quoted form"
+  (= '(__) (list 1 2 3 4 5))
+
+  "They are Clojure seqs (sequences), so they allow access to the first"
+  (= __ (first '(1 2 3 4 5)))
+
+  "As well as the rest"
+  (= __ (rest '(1 2 3 4 5)))
+
+  "The rest when nothing is left is empty"
+  (= __ (rest '(100)))
+
+  "And construction by adding an element to the front is simple"
+  (= __ (cons :a '(:b :c :d :e)))
+
+  "Conjoining an element to a list can be done in the reverse order"
+  (= __ (conj '(:a :b :c :d :e) 0))
+
+  "You can use a list like a stack to get the first element"
+  (= __ (peek '(:a :b :c :d :e)))
+
+  "Or the others"
+  (= __ (pop '(:a :b :c :d :e)))
+
+  "But watch out if you try to pop nothing"
+  (= __ (try
+          (pop '())
+          (catch IllegalStateException e "No dice!")))
+
+  "The rest of nothing isn't so strict"
+  (= __ (try
+          (rest '())
+          (catch IllegalStateException e "No dice!"))))

koans/path_to_enlightenment.clj

@@ -13,6 +13,7 @@
                  pairs)))))
 
 (load "about_equalities")
+(load "about_lists")
 (load "about_vectors")
 (load "about_sets")
 (load "about_maps")