Solved

create a common array

Posted on 2002-04-22
4
251 Views
Last Modified: 2010-05-02
Hi,

I have 2 arrays : arr1(5) , arr2(3) . How can I create a third array which contains only the common items in arr1 & arr2
Important: arr2() may becomes one time longer than arr1() , I mean that their long are not fixed
I look forward the code which can do that.

Thanx
0
Comment
Question by:ray14
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 3

Expert Comment

by:jjmartin
ID: 6961397
Are the array's sorted in any particular order?
0
 
LVL 15

Accepted Solution

by:
ameba earned 100 total points
ID: 6961438
' Form1 code
Option Explicit

Private Sub Form_Click()
    Print Join(GetCommon(Split("a b cc dd", " "), Split("cc dd e f", " ")), " ")
End Sub

' returns items which are in a1 and a2
Private Function GetCommon(a1 As Variant, a2 As Variant) As Variant
    Dim col1 As New Collection, colBoth As New Collection, arrBoth() As String
    Dim i As Long, tmp As String
    On Error Resume Next
   
    ' build collection of unique values
    For i = 0 To UBound(a1)
        col1.Add a1(i), "k" & a1(i)
    Next
   
    ' test all values in a2
    For i = 0 To UBound(a2)
        Err.Clear
        tmp = col1.Item("k" & a2(i)) ' if Item does not exist, we'll get error
        If (Err = 0) Then colBoth.Add a2(i), "k" & a2(i) 'Item exists
    Next
   
    ' fill array
    ReDim arrBoth(0 To colBoth.Count - 1)
    For i = 1 To colBoth.Count
        arrBoth(i - 1) = colBoth.Item(i)
    Next
    GetCommon = arrBoth    ' return array
End Function
0
 

Author Comment

by:ray14
ID: 6963434
Hi ameba,

Thanks for your answer and it is  nice to receive your help again. As I promised in my last question I’ll increase the points by +50 then it will be 100  thanks again.

 Ray14
0
 
LVL 15

Expert Comment

by:ameba
ID: 6963463
Thank you  :-)
0

Featured Post

Enroll in June's Course of the Month

June’s Course of the Month is now available! Experts Exchange’s Premium Members, Team Accounts, and Qualified Experts have access to a complimentary course each month as part of their membership—an extra way to sharpen your skills and increase training.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

You can of course define an array to hold data that is of a particular type like an array of Strings to hold customer names or an array of Doubles to hold customer sales, but what do you do if you want to coordinate that data? This article describes…
Since upgrading to Office 2013 or higher installing the Smart Indenter addin will fail. This article will explain how to install it so it will work regardless of the Office version installed.
Get people started with the process of using Access VBA to control Outlook using automation, Microsoft Access can control other applications. An example is the ability to programmatically talk to Microsoft Outlook. Using automation, an Access applic…
Show developers how to use a criteria form to limit the data that appears on an Access report. It is a common requirement that users can specify the criteria for a report at runtime. The easiest way to accomplish this is using a criteria form that a…

724 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question