Removing duplicates from two strings

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Plz Help I got two string values
string a= "1,3,2,4,5";
b = "3,4";
c = a-b;
c = "1,2,5";
remove second string value from first string
and I want the result as "1,2,5"

Posted 11-Sep-14 0:32am

prasannakumarmp

Updated 11-Sep-14 1:14am

v5

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ErBhati 11-Sep-14 6:34am

your question is nor clear.

Bh@gyesh 11-Sep-14 6:36am

Can you please more elaborate on this?

[no name] 11-Sep-14 6:39am

Okay so remove the "3,4" from the first string.

4 solutions

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/\jmot · Answer 1 · 2014-09-11T08:50:00

Try this Code..

C#

string s1 = "1,2,3,4,5";
        string s2="2,3";
        var res1 = s1.Split(',');
        var res2 = s2.Split(',');
        string res = "";
        for(int i=0;i<res1.count();i++)>
        {
            for(int j=0;j<res2.count();>
            {
                if (res1[i] == res2[j])
                {
                    break;
                }
                else
                {
                    if ((j == (res2.Count() - 1)))
                    {

                        res = res + res1[i].ToString() + ",";
                    }
                }
            }
        }

_Asif_ · Answer 2 · 2014-09-11T02:59:00

Solution 5

Sounds like Homework. Try this

C#

char[] delimiterChars = { ',' };

string a = "1,3,2,4,5";
string b = "3,4";

string[] A = a.Split(delimiterChars);
string[] B = b.Split(delimiterChars);

List<string> C = A.Except<string>(B).ToList();
string c = string.Join(",", C);

Posted 11-Sep-14 2:59am

_Asif_

Comments

Matt T Heffron 11-Sep-14 12:03pm

+5

ClimerChinna · Answer 3 · 2014-09-11T02:12:00

try below code

C#

for (int i = 0; i < s1.Length; i++)
{
    int count = 0;
    if (s1[i] != ',')
    {

        for (int j = 0; j < s2.Length; j++)
        {
            if (s1[i].ToString() == s2[j].ToString())
            {
                count++;
            }
        }
        if (count == 0)
            s3 += s1[i].ToString() + ',';
    }
}
s3.Remove(s3.Length - 1);

Pheonyx · Answer 4 · 2014-09-11T00:45:00

Solution 1

C#

var s1 = "1,2,3,4,5";
var s2 = "3,4";
s1 = s1.Replace(s2, string.Empty).Replace(",,",",");

You are using the "Replace" method twice here, the first removes the second string, the second looks for double , and replaces it with a single ,

Posted 11-Sep-14 0:45am

Pheonyx

Comments

George Jonsson 11-Sep-14 7:18am

In this case what happens if s2 is changed to "2,3,4"?

Pheonyx 11-Sep-14 7:19am

You'd get 1,5 :-)

George Jonsson 11-Sep-14 8:20am

You are absolutely right.
My bad. :P

Removing duplicates from two strings

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