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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
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1 parent b69199c commit 6c8d354b8d9ca2fa62d0e062fa6346673dd15dbf @dhh dhh committed
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4 activesupport/lib/active_support/core_ext/fixnum.rb
@@ -3,3 +3,7 @@
class Fixnum #:nodoc:
include ActiveSupport::CoreExtensions::Fixnum::EvenOdd
end
+
+class Bignum #:nodoc:
+ include ActiveSupport::CoreExtensions::Fixnum::EvenOdd
+end
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6 activesupport/lib/active_support/core_ext/fixnum/even_odd.rb
@@ -7,8 +7,12 @@ module Fixnum #: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?
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15 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

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