How to compare two array lists ?

Question

0.00/5 (No votes)

See more:

Hi I have two array lists of different sizes. suppose list1 have 4 values and list 2 have two values. My question is "how to check whether list 2 values are present in list1 or not ?

Posted 20-Jun-13 20:41pm

mskphani

Add a Solution

Comments

Jameel VM 21-Jun-13 2:45am

can you post the code of the two array lists?

5 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Bilashcse · Answer 1 · 2013-06-21T12:31:00

Check this. I think you will get your solution.

code:

ArrayList numList1 = new ArrayList(new int[] { 1, 2, 3, 4});
            ArrayList numList2 = new ArrayList(new int[] { 1, 5, 3});


            ArrayList numListDiff3 = new ArrayList();
            foreach (int listElement in numList1)
            {
                if (!numList2.Contains(listElement))
                {
                    numListDiff3.Add(listElement);
                }
            }


            foreach (int listElement in numList2)
            {
                if (!numList1.Contains(listElement))
                {
                    numListDiff3.Add(listElement);
                }
            }

Source: http://forums.asp.net/post/3573258.aspx[^]

[Edit]Reference to original answer added[/Edit]

Prasad_Kulkarni · Answer 2 · 2013-06-20T20:48:00

Solution 3

Something like this:

C#

ArrayList list1 = new ArrayList(new int[] {1,2,3,4,5});
ArrayList list2 = new ArrayList(new int[] {1,2,8});
for (int i=0; i<list1.count && i<list2.Count; i++) {
    if (!Object.Equals(list1[i], list2[i]))
        Console.WriteLine("Different value at index {0}.", i);
}

Posted 20-Jun-13 20:48pm

Prasad_Kulkarni

Updated 20-Jun-13 20:50pm

v2

Rajesh Anuhya · Answer 3 · 2013-06-20T20:44:00

Solution 1

See the below links, this may helps you

http://stackoverflow.com/questions/4153120/whats-the-fastest-way-to-compare-two-arrays-for-equality[^]
http://stackoverflow.com/questions/683310/getting-the-diff-between-two-arrays-in-c[^]
Thanks
-RA

Posted 20-Jun-13 20:44pm

Rajesh Anuhya

LOUIS Christian · Answer 4 · 2013-06-20T20:45:00

Solution 2

Hi,
I will propose to use Linq to do your operation.
You can find a discussion on this point:
http://stackoverflow.com/questions/9524681/linq-compare-two-lists[^]

Best regards.

Posted 20-Jun-13 20:45pm

LOUIS Christian

samadhan_kshirsagar · Answer 5 · 2013-06-20T22:26:00

ArrayList list1 = new ArrayList(new int[] {1,2,3,4,5});

ArrayList list2 = new ArrayList(new int[] {1,2,8});

for (int i=0; i<list1.Count && i<list2.Count; i++)

{

if (!Object.Equals(list1[i], list2[i]))

Console.WriteLine("Different value at index {0}.", i);

}

if (list1.Count > list2.Count)

Console.WriteLine("list1 has more elements than list2.");

if (list2.Count > list1.Count)

Console.WriteLine("list2 has more elements than list1.");

Console.ReadLine();

}