Login | Register   
RSS Feed
Download our iPhone app
Browse DevX
Sign up for e-mail newsletters from DevX

By submitting your information, you agree that devx.com may send you DevX offers via email, phone and text message, as well as email offers about other products and services that DevX believes may be of interest to you. DevX will process your information in accordance with the Quinstreet Privacy Policy.

Tip of the Day
Language: VB7
Expertise: beginner
Oct 27, 2003



Application Security Testing: An Integral Part of DevOps

ArrayListMerge - Merging two ArrayList avoiding duplicate values

' 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)
'   Next

Function ArrayListMerge(ByVal al1 As ArrayList, ByVal al2 As ArrayList) As _
    ' 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

    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
        End If

    ' trim the ArrayList to the number of actually used slots
    Return res
End Function
Marco Bellinaso
Comment and Contribute






(Maximum characters: 1200). You have 1200 characters left.



We have made updates to our Privacy Policy to reflect the implementation of the General Data Protection Regulation.
Thanks for your registration, follow us on our social networks to keep up-to-date