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* enumerator.c (lazy_flat_map): add Enumerable::Lazy#flat_map.

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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@34956 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
shugo 2012-03-09 05:34:41 +00:00
parent 5452b18f99
commit a21d0f72c2
3 changed files with 40 additions and 0 deletions
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8
test/ruby/test_lazy_enumerator.rb
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@ -80,6 +80,14 @@ class TestLazyEnumerator < Test::Unit::TestCase
assert_equal(1, a.current)
end
def test_flat_map
a = Step.new(1..3)
assert_equal(2, a.flat_map {|x| [x * 2]}.first)
assert_equal(3, a.current)
assert_equal(2, a.lazy.flat_map {|x| [x * 2]}.first)
assert_equal(1, a.current)
end
def test_reject
a = Step.new(1..6)
assert_equal(4, a.reject {|x| x < 4}.first)