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author | knu <knu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2017-10-22 12:25:34 +0000 |
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committer | knu <knu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2017-10-22 12:25:34 +0000 |
commit | 8c90432af72a59d8934b2c94a1bc847449e1f393 (patch) | |
tree | 2c50ce486548899b86a3cb114c93c1333de18be2 /lib/set.rb | |
parent | 6693e3e7230ca64b01ffb24d2693af1c77bd2998 (diff) | |
download | ruby-8c90432af72a59d8934b2c94a1bc847449e1f393.tar.gz |
Add `Set#reset`
This method resets the internal state of a set after modification to
existing elements, reindexing and deduplicating them. [Feature #6589]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60360 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'lib/set.rb')
-rw-r--r-- | lib/set.rb | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/lib/set.rb b/lib/set.rb index b668738ebb..5da196d1e0 100644 --- a/lib/set.rb +++ b/lib/set.rb @@ -477,6 +477,19 @@ class Set @hash.eql?(o.instance_variable_get(:@hash)) end + # Resets the internal state after modification to existing elements + # and returns self. + # + # Elements will be reindexed and deduplicated. + def reset + if @hash.respond_to?(:rehash) + @hash.rehash # This should perform frozenness check. + else + raise "can't modify frozen #{self.class.name}" if frozen? + end + self + end + # Returns true if obj is a member of the set, and false otherwise. # # Used in case statements: @@ -731,6 +744,11 @@ class SortedSet < Set to_a super end + + def rehash + @keys = nil + super + end END end # a hack to shut up warning |