#81

Set Intersection

 

Write a function which returns the intersection of two sets. The intersection is the sub-set of items that each set has in common.

	(= (__ #{0 1 2 3} #{2 3 4 5}) #{2 3})
	(= (__ #{0 1 2} #{3 4 5}) #{})
	(= (__ #{:a :b :c :d} #{:c :e :a :f :d}) #{:a :c :d})