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* lib/prime.rb (Prime#prime?): negative numbers can't be primes
by definition. reported by Ivan Kataitsev. [Bug #7395] * test/test_prime.rb: add test. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45878 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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Fri May 9 03:07:09 2014 Ayumu AIZAWA <ayumu.aizawa@gmail.com>
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* lib/prime.rb (Prime#prime?): negative numbers can't be primes
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by definition. reported by Ivan Kataitsev. [Bug #7395]
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* test/test_prime.rb: add test.
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Thu May 8 14:34:29 2014 Nobuyoshi Nakada <nobu@ruby-lang.org>
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* class.c (rb_mod_init_copy): always clear instance variable,
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@ -157,7 +157,6 @@ class Prime
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# +value+:: an arbitrary integer to be checked.
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# +generator+:: optional. A pseudo-prime generator.
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def prime?(value, generator = Prime::Generator23.new)
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value = -value if value < 0
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return false if value < 2
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for num in generator
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q,r = value.divmod num
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@ -141,8 +141,8 @@ class TestPrime < Test::Unit::TestCase
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# negative
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assert !-1.prime?
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assert(-2.prime?)
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assert(-3.prime?)
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assert !-2.prime?
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assert !-3.prime?
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assert !-4.prime?
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end
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end
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