diff options
Diffstat (limited to 'lib')
-rw-r--r-- | lib/set.rb | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/lib/set.rb b/lib/set.rb index a9aa7e7936..47fcc3efc7 100644 --- a/lib/set.rb +++ b/lib/set.rb @@ -148,6 +148,16 @@ class Set @hash.keys end + # Returns self if no arguments are given. Otherwise, converts the + # set to another with klass.new(self, *args, &block). + # + # In subclasses, returns klass.new(self, *args, &block) unless + # overridden. + def to_set(klass = Set, *args, &block) + return self if instance_of?(Set) && klass == Set && block.nil? && args.empty? + klass.new(self, *args, &block) + end + def flatten_merge(set, seen = Set.new) # :nodoc: set.each { |e| if e.is_a?(Set) |