Added Fixnum#ordinalize to turn 1.ordinalize to "1st", 3.ordinalize t…

…o "3rd", and 10.ordinalize to "10th" and so on #1724 [paul@cnt.org]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@1852 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activesupport/CHANGELOG

@@ -1,3 +1,8 @@
+*SVN*
+
+* Added Fixnum#ordinalize to turn 1.ordinalize to "1st", 3.ordinalize to "3rd", and 10.ordinalize to "10th" and so on #1724 [paul@cnt.org]
+
+
 *1.1.1* (11 July, 2005)
 
 * Added more efficient implementation of the development mode reset of classes #1638 [Chris McGrath]

activesupport/lib/active_support/core_ext/fixnum/inflections.rb

@@ -0,0 +1,15 @@
+require File.dirname(__FILE__) + '/../../inflector'
+module ActiveSupport #:nodoc:
+  module CoreExtensions #:nodoc:
+    module Fixnum #:nodoc:
+      module Inflections
+        # 1.ordinalize  # => "1st"
+        # 3.ordinalize  # => "3rd"
+        # 10.ordinalize # => "10th"
+        def ordinalize
+          Inflector.ordinalize(self)
+        end
+      end
+    end
+  end
+end

activesupport/lib/active_support/inflector.rb

@@ -60,6 +60,19 @@ def constantize(camel_cased_word)
     end
   end
 
+  def ordinalize(number)
+    if (11..13).include?(number.to_i % 100)
+      "#{number}th"
+    else
+      case number.to_i % 10
+        when 1: "#{number}st"
+        when 2: "#{number}nd"
+        when 3: "#{number}rd"
+        else    "#{number}th"
+      end
+    end
+  end
+
   private
     def uncountable_words #:doc
       %w( equipment information rice money species series fish )
@@ -121,4 +134,4 @@ def singular_rules #:doc:
         [/s$/i, '']
       ]
     end
-end
+end

activesupport/test/inflector_test.rb

@@ -131,6 +131,37 @@ class InflectorTest < Test::Unit::TestCase
     "underground"     => "Underground"
   }
 
+  OrdinalNumbers = {
+    "0" => "0th",
+    "1" => "1st",
+    "2" => "2nd",
+    "3" => "3rd",
+    "4" => "4th",
+    "5" => "5th",
+    "6" => "6th",
+    "7" => "7th",
+    "8" => "8th",
+    "9" => "9th",
+    "10" => "10th",
+    "11" => "11th",
+    "12" => "12th",
+    "13" => "13th",
+    "14" => "14th",
+    "20" => "20th",
+    "21" => "21st",
+    "22" => "22nd",
+    "23" => "23rd",
+    "24" => "24th",
+    "100" => "100th",
+    "101" => "101st",
+    "102" => "102nd",
+    "103" => "103rd",
+    "104" => "104th",
+    "110" => "110th",
+    "1000" => "1000th",
+    "1001" => "1001st"
+  }
+
   def test_pluralize_plurals
     assert_equal "plurals", Inflector.pluralize("plurals")
     assert_equal "Plurals", Inflector.pluralize("Plurals")
@@ -214,4 +245,10 @@ def test_constantize
     assert_equal InflectorTest, Inflector.constantize("InflectorTest")
     assert_raises(NameError) { Inflector.constantize("UnknownClass") }
   end
-end
+
+  def test_ordinal
+    OrdinalNumbers.each do |number, ordinalized|
+      assert_equal(ordinalized, Inflector.ordinalize(number))
+    end
+  end
+end