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* enumerator.c (enumerator_with_memo): New method: with_memo().

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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@16795 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
knu 2008-06-03 12:43:45 +00:00
parent 3064bb9f8d
commit a96cf7a7a5
4 changed files with 61 additions and 0 deletions
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19
test/ruby/test_enumerator.rb
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@ -91,6 +91,25 @@ class TestEnumerator < Test::Unit::TestCase
assert_equal([[1,0],[2,1],[3,2]], @obj.to_enum(:foo, 1, 2, 3).with_index.to_a)
end
def test_with_memo
r = 1..10
assert_equal([55, 3628800], (1..10).each.with_memo([0,1]) {|i, memo|
memo[0] += i
memo[1] *= i
})
a = [2,5,2,1,5,3,4,2,1,0]
a.delete_if.with_memo({}) {|i, seen|
if seen.key?(i)
true
else
seen[i] = true
false
end
}
assert_equal([2, 5, 1, 3, 4, 0], a)
end
def test_next_rewind
e = @obj.to_enum(:foo, 1, 2, 3)
assert_equal(1, e.next)