diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/set.rb | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/lib/set.rb b/lib/set.rb index e30d590c5d..3aebb89376 100644 --- a/lib/set.rb +++ b/lib/set.rb @@ -240,6 +240,12 @@ class Set # Returns true if the set and the given set have at least one # element in common. + # + # e.g.: + # + # require 'set' + # Set[1, 2, 3].intersect? Set[4, 5] # => false + # Set[1, 2, 3].intersect? Set[3, 4] # => true def intersect?(set) set.is_a?(Set) or raise ArgumentError, "value must be a set" if size < set.size @@ -251,6 +257,13 @@ class Set # Returns true if the set and the given set have no element in # common. This method is the opposite of +intersect?+. + # + # e.g.: + # + # require 'set' + # Set[1, 2, 3].disjoint? Set[3, 4] # => false + # Set[1, 2, 3].disjoint? Set[4, 5] # => true + def disjoint?(set) !intersect?(set) end |