Finished koan 16

src/koans/16_refs.clj

@@ -6,31 +6,33 @@
 
 (meditations
   "In the beginning, there was a word"
-  (= __ (deref the-world))
+  (= "hello" (deref the-world))
 
   "You can get the word more succinctly, but it's the same"
-  (= __ @the-world)
+  (= "hello" @the-world)
 
   "You can be the change you wish to see in the world."
-  (= __ (do
-          (dosync (ref-set the-world "better"))
+  (= "better" 
+     (do (dosync (ref-set the-world "better"))
           @the-world))
 
   "Alter where you need not replace"
-  (= __ (let [exclamator (fn [x] (str x "!"))]
-          (dosync
-           (alter the-world exclamator)
-           (alter the-world exclamator)
-           (alter the-world exclamator))
-          @the-world))
+  (= "better!!!" 
+     (let [exclamator (fn [x] (str x "!"))]
+       
+       (dosync (alter the-world exclamator) 
+               (alter the-world exclamator) 
+               (alter the-world exclamator))
+       
+       @the-world))
 
   "Don't forget to do your work in a transaction!"
-  (= 0 (do __
+  (= 0 (do (dosync (ref-set the-world 0))
            @the-world))
 
   "Functions passed to alter may depend on the data in the ref"
   (= 20 (do
-          (dosync (alter the-world ___))))
+          (dosync (alter the-world + 20))))
 
   "Two worlds are better than one"
   (= ["Real Jerry" "Bizarro Jerry"]
@@ -39,4 +41,4 @@
           (ref-set the-world {})
           (alter the-world assoc :jerry "Real Jerry")
           (alter bizarro-world assoc :jerry "Bizarro Jerry")
-          __))))
+          print(map :jerry [@the-world @bizarro-world])))))