' Merge two ArrayList, avoiding duplicate values (if there are already ' duplicate values in same input ArrayList however, they are not discarded)' ' Example:' Dim al1 As New ArrayList' al1.Add("John")' al1.Add("Ann")' al1.Add("Frank")'' Dim al2 As New ArrayList' al2.Add("Ann")' al2.Add("Tony")' al2.Add("Mark")' al2.Add("John")'' Dim al3 As ArrayList = ArrayListMerge(al1, al2)' Dim o As Object' Debug.WriteLine("Number of elements in the ArrayList returned from ' ArrayListMerge: " & al3.Count)' For Each o In al3' Debug.WriteLine(o)' NextFunction ArrayListMerge(ByVal al1 As ArrayList, ByVal al2 As ArrayList) As _ ArrayList ' initialize the capacity to the total count of elements from both array ' lists Dim res As New ArrayList(al1.Count + al2.Count) ' append the items in the first ArrayList res.AddRange(al1) Dim o As Object For Each o In al2 ' add all the al2's elements that are not contained in al1 If Not al1.Contains(o) Then res.Add(o) End If Next ' trim the ArrayList to the number of actually used slots res.TrimToSize() Return resEnd Function


Different Types of Data Models Explained with Examples
In the modern world, data is everything and everywhere. With so much access to technology, data has become a valuable resource for any business. Albeit a complex one. Data is