Add ActiveSupport::Multibyte::Chars#ord method so that it returns cor…

…rect Unicode value instead of falling back on String#ord in CoreExtensions, which is not multibyte compatible

[#1483 state:committed]

Signed-off-by: Jeremy Kemper <jeremy@bitsweat.net>

activesupport/CHANGELOG

@@ -1,4 +1,9 @@
-*2.2 (November 21st, 2008)*
+*2.2.3 (next release)*
+
+* Multibyte: add multibyte-safe Chars#ord rather than falling back to String#ord.  #1483 [Jason Cheow]
+
+
+*2.2.2 (November 21st, 2008)*
 
 * TimeZone offset tests: use current_period, to ensure TimeZone#utc_offset is up-to-date [Geoff Buesing]
 

activesupport/lib/active_support/multibyte/chars.rb

@@ -344,6 +344,14 @@ def slice(*args)
       end
       alias_method :[], :slice
 
+      # Converts first character in the string to Unicode value
+      #
+      # Example:
+      #   'こんにちは'.mb_chars.ord #=> 12371
+      def ord
+        self.class.u_unpack(@wrapped_string)[0]
+      end
+
       # Convert characters in the string to uppercase.
       #
       # Example:

activesupport/test/multibyte_chars_test.rb

@@ -397,6 +397,10 @@ def test_slice_should_throw_exceptions_on_invalid_arguments
     assert_raise(ArgumentError) { @chars.slice(1, 1, 1) }
   end
 
+  def test_ord_should_return_unicode_value_for_first_character
+    assert_equal 12371, @chars.ord
+  end
+
   def test_upcase_should_upcase_ascii_characters
     assert_equal '', ''.mb_chars.upcase
     assert_equal 'ABC', 'aBc'.mb_chars.upcase