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hash.c: rb_hash_reject without dup

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* hash.c (rb_hash_reject): copy unrejected elements only to new hash,
  so that the change on the original receiver can affect.
  [ruby-core:58914] [Bug #9223]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44047 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2013-12-07 02:16:04 +00:00
parent 77280b6cd6
commit 7416073cde
3 changed files with 30 additions and 4 deletions
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10
test/ruby/test_enumerator.rb
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@ -501,9 +501,13 @@ class TestEnumerator < Test::Unit::TestCase
def test_size_for_enum_created_from_hash
h = {a: 1, b: 2, c: 3}
%i[delete_if reject! select select! keep_if each each_key each_pair].each do |method|
assert_equal 3, h.send(method).size
end
methods = %i[delete_if reject reject! select select! keep_if each each_key each_pair]
enums = methods.map {|method| h.send(method)}
s = enums.group_by(&:size)
assert_equal([3], s.keys, ->{s.reject!{|k| k==3}.inspect})
h[:d] = 4
s = enums.group_by(&:size)
assert_equal([4], s.keys, ->{s.reject!{|k| k==4}.inspect})
end
def test_size_for_enum_created_from_env