Solved

Adding arrays

Posted on 2009-04-12
14
219 Views
Last Modified: 2013-11-26
How can I add two arraylist togther to make a single arraylist. I have an array list of 1240 reading and I want to add the second array that has 6 arraylist reading to the front end, how can I do this

Dim array1 as New arraylist
Dim array2 as new arraylist


0
Comment
Question by:cmdolcet
  • 6
  • 5
  • 3
14 Comments
 
LVL 48

Expert Comment

by:jpaulino
ID: 24127292
You can use AddRange to add the array1 into array2

array2.AddRange(array1)
0
 

Author Comment

by:cmdolcet
ID: 24127392
what if i wanted to put arraylist in the upper 6  of arraylist 1 total 1240 and the bottom 6

0
 
LVL 48

Expert Comment

by:jpaulino
ID: 24127396
You can use InsertRange where you can define where to insert

array2.InsertRange(0, array1)
0
Master Your Team's Linux and Cloud Stack!

The average business loses $13.5M per year to ineffective training (per 1,000 employees). Keep ahead of the competition and combine in-person quality with online cost and flexibility by training with Linux Academy.

 
LVL 48

Expert Comment

by:jpaulino
ID: 24127398
0 is the position (index)
0
 
LVL 85

Expert Comment

by:Mike Tomlinson
ID: 24127401
I think you'd have to iterate over array2 and use the Insert() command:

        For i As Integer = 0 To array2.Count - 1
            array1.Insert(i, array2(i))
        Next
0
 
LVL 85

Expert Comment

by:Mike Tomlinson
ID: 24127409
Haha...InsertRange() is better...silly Intellisense!

0
 
LVL 85

Expert Comment

by:Mike Tomlinson
ID: 24127412
(and silly Idle_Mind)
0
 
LVL 48

Expert Comment

by:jpaulino
ID: 24127432
LOL,
Idle_Mind you have to select the Intellisense to show all the available properties and methods and not only the common ones :)
0
 

Author Comment

by:cmdolcet
ID: 24127442
ok so if i understand this correctly then
array2.InsertRange(0, array1) would insert the second array onto the top of the first therefore this code would only work if i insert the second array on the top of the forst array. but lets say i wanted to insert the second array on the bottom i would use the following code
array2.InsertRange(1240, array1)

correct?
0
 
LVL 48

Expert Comment

by:jpaulino
ID: 24127449
If you can insert at the bottom you can use AddRange:
array2.AddRange(array1)
 
0
 
LVL 85

Expert Comment

by:Mike Tomlinson
ID: 24127456
If you want to add array2 into array1 then you need to call the methods against array1:

    array1.InsertRange(0, array2) ' <-- add array2 to the top of array1

    array1.AddRange(array2) ' <-- add array2 to the bottom of array1
0
 

Author Comment

by:cmdolcet
ID: 24127464
no lets say i want to not add the array 2 to the top but now the bottom how can i do that?

The overall idea is having 3 arraylist, arraylist 1 would be the master array i want to add arraylist 2 to the top of arraylist1 and arrayllist 3 to the bottom of arraylist 1

se the visual pic would be this
arraylist2
arraylist1
arraylist3

I hope this helps sorry for being so confusing :)
0
 
LVL 48

Accepted Solution

by:
jpaulino earned 250 total points
ID: 24127467
Should be this way then to have all values in the array1

array1.InsertRange(0, array2)
array1.AddRange(array3)

Open in new window

0
 
LVL 85

Assisted Solution

by:Mike Tomlinson
Mike Tomlinson earned 250 total points
ID: 24127473
That would be:

    array1.InsertRange(0, array2) ' <-- add array2 to the top of array1
    array1.AddRange(array3) ' <-- add array3 to the bottom of array1

(assuming that you want to change the contents of array1)

If you want to keep all the arraylists intact, then create a new one:

    Dim array4 As New ArrayList
    array4.AddRange(array2)
    array4.AddRange(array1)
    array4.AddRange(array3)
0

Featured Post

Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Visual Studios 1 77
TimeZone, day light savings, Sql server, asp.net 6 38
System.net.Sockets Error 5 28
Need help converting bitmap to image in VB.Net 8 30
It was really hard time for me to get the understanding of Delegates in C#. I went through many websites and articles but I found them very clumsy. After going through those sites, I noted down the points in a easy way so here I am sharing that unde…
Real-time is more about the business, not the technology. In day-to-day life, to make real-time decisions like buying or investing, business needs the latest information(e.g. Gold Rate/Stock Rate). Unlike traditional days, you need not wait for a fe…
Email security requires an ever evolving service that stays up to date with counter-evolving threats. The Email Laundry perform Research and Development to ensure their email security service evolves faster than cyber criminals. We apply our Threat…

831 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