methoded_hash.rb in ruby-mext-0.16.1

- old
+ new

@@ -1,5 +1,14 @@
+#
+# +MethodedHash+
+#
+# is a subclass of Hash which basically will create an accessor method
+# for every key in the hash, transforming all sub-hashes into +MethodedHash+
+# classes and so on (recursive).
+#
+# Please note: it will *NOT* add a method if the method already exist.
+#
 class MethodedHash < Hash
 
   def initialize(h = {})
     duplicate_hash(h)
     self
@@ -29,12 +38,19 @@
 
   def common_methodizer(k)
     methodize(k)
   end
 
+  #
+  # +methodize(key)+
+  #
+  # this is the method that normalizes keys (to be able to transform them in
+  # methods. Please note that "methodization" will only happen if the
+  # class does not already respond to a normalized key method.
+  #
   def methodize(key)
     nk = normalize_key(key)
-    define_singleton_method(nk) { self[key] }
+    define_singleton_method(nk) { self[key] } unless self.respond_to?(nk)
   end
 
   def normalize_key(key)
     ek = key.to_s.gsub(/\W/, '_')
     ek.to_sym