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Task/Symmetric-difference/Eiffel/symmetric-difference.e

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+note
+	description: "Summary description for {SYMETRIC_DIFFERENCE_EXAMPLE}."
+	URI: "http://rosettacode.org/wiki/Symmetric_difference"
+
+class
+	SYMETRIC_DIFFERENCE_EXAMPLE
+
+create
+	make
+
+feature {NONE} -- Initialization
+
+	make
+		local
+			a,a1,b,b1: ARRAYED_SET [STRING]
+		do
+			create a.make (4)
+			create b.make (4)
+			a.compare_objects
+			b.compare_objects
+			a.put ("John")
+			a.put ("Bob")
+			a.put ("Mary")
+			a.put ("Serena")
+
+			create a1.make (4)
+			a1.copy (a)
+
+			b.put ("Jim")
+			b.put ("Mary")
+			b.put ("John")
+			b.put ("Bob")
+
+			create b1.make (4)
+			b1.copy (b)
+
+		    a1.subtract (b1)
+		    b.subtract (a)
+		    a1.merge (b)
+		    across a1 as c loop
+		    	print (" " + c.item)
+		    end
+		end
+
+end