Unsort extensions, restore old sort order.

Resolves #71.

History-Types.rdoc

@@ -1,5 +1,11 @@
 = MIME Types Changes by Version
 
+== 2.4 / 2014-10-DD
+
+* Changed the sort order of many of the extensions to restore behaviour
+  from mime-types 1.25.1.
+* Updated the IANA media registry entries as of release date.
+
 == 2.3 / 2014-05-23
 
 * Updated the IANA media registry entries as of release date.

History.rdoc

@@ -1,3 +1,16 @@
+== 2.4 / 2014-10-DD
+
+* Bugs:
+  * Restored the extension sort order from mime-types 1.25.1 and modified
+    MIME::Type#extensions= to no longer sort extensions when set. This resolves
+    {#71}[https://github.com/halostatue/mime-types/issues/71] and should fix
+    Paperclip.
+* API Changes:
+  * Added MIME::Type#preferred_extension to return the preferred extension for
+    the MIME type. This should be used in preference to the current mechanism
+    used by many clients, <tt>type.extensions.first</tt>. This will allow the
+    implementation to change over time.
+
 == 2.3 / 2014-05-23
 
 * Bugs:

lib/mime/type.rb

@@ -219,12 +219,13 @@ def eql?(other)
   #   text/plain        => text/plain
   #   x-chemical/x-pdb  => chemical/pdb
   attr_reader :simplified
+
   # The list of extensions which are known to be used for this MIME::Type.
   # Non-array values will be coerced into an array with #to_a. Array values
-  # will be flattened, +nil+ values removed, sorted, and made unique.
+  # will be flattened, +nil+ values removed, and made unique.
   attr_reader :extensions
   def extensions=(ext) # :nodoc:
-    @extensions = Array(ext).flatten.compact.sort.uniq
+    @extensions = Array(ext).flatten.compact.uniq
   end
 
   # Merge the extensions provided into this MIME::Type. The extensions added
@@ -233,6 +234,16 @@ def add_extensions(*ext)
     self.extensions = self.extensions + ext
   end
 
+  ##
+  # The preferred extension for this MIME type, if one is set.
+  #
+  # :attr_reader: preferred_extension
+
+  ##
+  def preferred_extension
+    extensions.first
+  end
+
   # The encoding (7bit, 8bit, quoted-printable, or base64) required to
   # transport the data of this content type safely across a network, which
   # roughly corresponds to Content-Transfer-Encoding. A value of +nil+ or