Added Fix/Bignum#multiple_of? which returns true on 14.multiple_of?(7) and false on 16.multiple_of?(7) #1464 [Thomas Fuchs] Added even? and odd? to work with Bignums in addition to Fixnums #1464 [Thomas Fuchs]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@1462 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activesupport/lib/active_support/core_ext/fixnum.rb

@@ -3,3 +3,7 @@ require File.dirname(__FILE__) + '/fixnum/even_odd'
 class Fixnum #:nodoc:
   include ActiveSupport::CoreExtensions::Fixnum::EvenOdd
 end
+
+class Bignum #:nodoc:
+  include ActiveSupport::CoreExtensions::Fixnum::EvenOdd
+end

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

@@ -7,8 +7,12 @@ module ActiveSupport #:nodoc:
       # * 2.even? # => true
       # * 2.odd? # => false
       module EvenOdd
+        def multiple_of?(number)
+          self % number == 0
+        end
+        
         def even?
-          self % 2 == 0
+          multiple_of? 2
         end
         
         def odd?

activesupport/test/core_ext/fixnum_ext_test.rb

@@ -5,10 +5,25 @@ class FixnumExtTest < Test::Unit::TestCase
   def test_even
     assert [ -2, 0, 2, 4 ].all? { |i| i.even? }
     assert ![ -1, 1, 3 ].all? { |i| i.even? }
+    
+    assert 22953686867719691230002707821868552601124472329079.odd?
+    assert !22953686867719691230002707821868552601124472329079.even?
+    assert 22953686867719691230002707821868552601124472329080.even?
+    assert !22953686867719691230002707821868552601124472329080.odd?
   end
 
   def test_odd
     assert ![ -2, 0, 2, 4 ].all? { |i| i.odd? }
     assert [ -1, 1, 3 ].all? { |i| i.odd? }
   end
+  
+  def test_multiple_of
+    assert [ -7, 0, 7, 14 ].all? { |i| i.multiple_of? 7 }
+    assert ![ -7, 0, 7, 14 ].all? { |i| i.multiple_of? 6 }
+    # test with a prime
+    assert !22953686867719691230002707821868552601124472329079.multiple_of?(2)
+    assert !22953686867719691230002707821868552601124472329079.multiple_of?(3)
+    assert !22953686867719691230002707821868552601124472329079.multiple_of?(5)
+    assert !22953686867719691230002707821868552601124472329079.multiple_of?(7)
+  end
 end