indifferent_access.rb in configurable-0.3.0

- old
+ new

@@ -1,22 +1,35 @@
 module Configurable
+  
+  # Implements AGET and ASET methods that symbolize string keys, in effect 
+  # producing indifferent access.  IndifferentAccess is intended to extend
+  # a Hash.
+  #
+  # Note that the indifference produced by this module is very thin indeed.
+  # Strings may still be used as keys through store/fetch, and
+  # existing string keys are not changed in any way.  Nonetheless,
+  # these methods are sufficient for Configurable and DelegateHash.
   module IndifferentAccess
-
+    
+    # Symbolizes string keys and calls super.
     def [](key)
       super(convert(key))
     end
-  
+    
+    # Symbolizes string keys and calls super.
     def []=(key, value)
       super(convert(key), value)
     end
-  
-    def key?(key)
-      super(convert(key))
+    
+    # Ensures duplicates use indifferent access.
+    def dup
+      super().extend IndifferentAccess
     end
-  
+    
     private
-  
-    def convert(key)
+    
+    # a helper to convert strings to symbols
+    def convert(key) # :nodoc:
       key.kind_of?(String) ? key.to_sym : key
     end
   end
 end
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