difference between two strings

Question

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how can i get difference between contents of two strings??
for eg

string test1 ="a,b,c,d,e";
string test2 ="b,e";

now i want difference between two strings as "a,c,d"

any help would be appreciated! :)

Posted 10-Aug-11 15:00pm

sanomama

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Christian Graus · Accepted Answer · 2011-08-10T15:08:00

Solution 1

There's no way beyond doing your own comparison. If the string is always in this format, then turn them both into arrays of strings, and then compare between them. Use the split method on the string class to split on the ,

Posted 10-Aug-11 15:08pm

Christian Graus

Comments

sanomama 10-Aug-11 21:18pm

i have splitted the string on , but couldn't compare the results too. Could would provide some code snippets or link.

Christian Graus 10-Aug-11 22:10pm

If you have an array, you can use the methods on the array to see if it contains a value. This is a basic programming task.

sanomama 10-Aug-11 22:24pm

thanks for ur time. i really appreciate it.

Mohammad A Rahman · Accepted Answer · 2011-08-10T15:51:00

Solution 2

It might help you,

C#

class Program
{
    static void Main(string[] args)
    {
        var result = Intersect();
        Console.WriteLine(result);
    }

    private static string Intersect()
    {
        string test1 = "a,b,c,d,e";
        string test2 = "b,e";
        return string.Join(",", test1.ToArray().Where(item => !test2.Contains(item.ToString())).ToArray());
    }
}

:)

Posted 10-Aug-11 15:51pm

Mohammad A Rahman

Updated 10-Aug-11 16:13pm

v2

Comments

sanomama 10-Aug-11 21:58pm

i couldn't get item after where in above code.
what am i missing? :(

Mohammad A Rahman 10-Aug-11 22:01pm

Could you please explain bit more. :)

sanomama 10-Aug-11 22:05pm

var result = string.Join(",", test1.ToArray().Where(item =>
in above code,
where(items =>

items is a keyword? or it sud be defined somewhere??

Mohammad A Rahman 10-Aug-11 22:06pm

No You dont, the type for item will infer by compiler on compile time. Just run the code you will get output.:)

sanomama 10-Aug-11 22:08pm

i tried but the items didn't appear
i'm trying in windows form.
do i have to add any namespace?

Mohammad A Rahman 10-Aug-11 22:13pm

Copy the Intersect method and put somewhere in your class and call the method and this method will return a string which you can use for example, MessageBox.Show(Intersect ());

Just be aware I wrote a console app to show you, where as you are using a windows app. So just use Intersect method.

sanomama 10-Aug-11 22:23pm

thanks. it works perfectly.
Can we get difference of "abcd-0001,abcd-0002"
and "abcd-0002" as "abcd-0001"

Mohammad A Rahman 10-Aug-11 22:29pm

great it works. U need to play with code to resolve the other problem. :)

sanomama 10-Aug-11 23:11pm

thanks a lot for your time :)

Member 11493360 17-Oct-15 5:28am

I have a question.

string s = "Naveen";
string z= "Praveen";

i want to show the difference between in these two strings and also the common between these two strings

Like Common is aveen and difference N and Pr

Please any one help to overcome this problem.

monali.k.gund 6-May-16 6:22am

List<int> unequalPositions = new List<int>();
string str1 = "HELLO";
string str2 = "WELLM";
for (int i = 0; i < str1.Length; i++)
{
if (str1[i] != str2[i])
{
unequalPositions.Add(i);
}
}

Member 14354532 4-May-19 3:28am

I have a question.

string s = "Naveen";
string z= "Praveen";

i want to show the difference between in these two strings and also want highlight difference between these two strings

Please any one help to overcome this problem.