kotovalexarian-likes-github/ruby--ruby
1
0
Fork 0
mirror of https://github.com/ruby/ruby.git synced 2022-11-09 12:17:21 -05:00
Code Releases Activity

* lib/prime.rb (Prime#prime_division): now decomposes

Browse source 
negative integer into a decomposition with element [-1, 1].

* test/test_prime.rb: test for it.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@24091 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
yugui 2009-07-13 13:51:49 +00:00
parent 0fefd19023
commit 7287b852da
3 changed files with 18 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

5
test/test_prime.rb
View file

@ -98,10 +98,15 @@ class TestPrime < Test::Unit::TestCase
def test_prime_division
pd = PRIMES.inject(&:*).prime_division
assert_equal PRIMES.map{|p| [p, 1]}, pd
pd = (-PRIMES.inject(&:*)).prime_division
assert_equal [-1, *PRIMES].map{|p| [p, 1]}, pd
end
def test_from_prime_division
assert_equal PRIMES.inject(&:*), Integer.from_prime_division(PRIMES.map{|p| [p,1]})
assert_equal -PRIMES.inject(&:*), Integer.from_prime_division([[-1, 1]] + PRIMES.map{|p| [p,1]})
end
def test_prime?