fix ruby errors in prototypes.md

The Queue example in ruby had a stray paren and a use of null instead of nil. Also I'm not sure why !! is needed in Queue#isEmpty - the < operator will always return true/false. But I haven't changed that because I'm not sure.
raganwald-deprecated · Mar 5, 2013 · 90a4438 · 90a4438
1 parent e4ce9f6
commit 90a4438
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/2013/02/prototypes.md b/2013/02/prototypes.md
@@ -62,8 +62,8 @@ class Queue
 
   def pullHead
     if !@isEmpty
-      @array[@head]).tap { |value|
-        @array[@head] = null
+      @array[@head].tap { |value|
+        @array[@head] = nil
         @head += 1
       }
     end