diff options
Diffstat (limited to 'lib/set.rb')
-rw-r--r-- | lib/set.rb | 44 |
1 files changed, 32 insertions, 12 deletions
diff --git a/lib/set.rb b/lib/set.rb index d612fdcb92..17775b07ea 100644 --- a/lib/set.rb +++ b/lib/set.rb @@ -220,33 +220,53 @@ class Set # Returns true if the set is a superset of the given set. def superset?(set) - set.is_a?(Set) or raise ArgumentError, "value must be a set" - return false if size < set.size - set.all? { |o| include?(o) } + case + when set.instance_of?(self.class) + @hash >= set.instance_variable_get(:@hash) + when set.is_a?(Set) + size >= set.size && set.all? { |o| include?(o) } + else + raise ArgumentError, "value must be a set" + end end alias >= superset? # Returns true if the set is a proper superset of the given set. def proper_superset?(set) - set.is_a?(Set) or raise ArgumentError, "value must be a set" - return false if size <= set.size - set.all? { |o| include?(o) } + case + when set.instance_of?(self.class) + @hash > set.instance_variable_get(:@hash) + when set.is_a?(Set) + size > set.size && set.all? { |o| include?(o) } + else + raise ArgumentError, "value must be a set" + end end alias > proper_superset? # Returns true if the set is a subset of the given set. def subset?(set) - set.is_a?(Set) or raise ArgumentError, "value must be a set" - return false if set.size < size - all? { |o| set.include?(o) } + case + when set.instance_of?(self.class) + @hash <= set.instance_variable_get(:@hash) + when set.is_a?(Set) + size <= set.size && all? { |o| set.include?(o) } + else + raise ArgumentError, "value must be a set" + end end alias <= subset? # Returns true if the set is a proper subset of the given set. def proper_subset?(set) - set.is_a?(Set) or raise ArgumentError, "value must be a set" - return false if set.size <= size - all? { |o| set.include?(o) } + case + when set.instance_of?(self.class) + @hash < set.instance_variable_get(:@hash) + when set.is_a?(Set) + size < set.size && all? { |o| set.include?(o) } + else + raise ArgumentError, "value must be a set" + end end alias < proper_subset? |