how to compare dates in one array

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hi,
i have a array which contains dates with duplications.i want result as dates with out duplication

ex 12/12/2013
12/12/2013
12/12/2013
12/12/2013
01/01/2014
01/02/2014
12/12/2013
11/11/2013
11/11/2013
10/10/2013

result should be
12/12/2013
01/01/2014
01/02/2014
12/12/2013
11/11/2013
10/10/2013

please help me to do this.provide any sample code

Posted 7-Jan-14 2:50am

kanna443

Updated 7-Jan-14 3:05am

CPallini

v2

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Tejas Vaishnav · Accepted Answer · 2014-01-07T02:56:00

Solution 1

can you please check it out below links..

http://weblogs.asp.net/hajan/archive/2010/09/20/get-distinct-values-of-an-array-using-linq.aspx[^]

Posted 7-Jan-14 2:56am

Tejas Vaishnav

Comments

Maciej Los 7-Jan-14 9:06am

Nice, +5!

Tejas Vaishnav 7-Jan-14 9:11am

Thnaks,

♥…ЯҠ…♥ · Accepted Answer · 2014-01-07T03:05:00

HI Kanna,

You could try this below code,
will do the trick for you

C#

string[] dateWithDup =new string[]{ "12/12/2013","12/12/2013","12/12/2013","12/12/2013","01/01/2014","01/02/2014","12/12/2013","11/11/2013","11/11/2013","10/10/2013"};
            string[] dateWithoutDup = new string[50];
            int count = 0;
            foreach (var date in dateWithDup)
            {
                if (!dateWithoutDup.Contains(date))
                {
                    dateWithoutDup[count] = date;
                    count++;
                }
            }

Hope this helps you a bit.

Regards,
RK

Maciej Los · Accepted Answer · 2014-01-07T03:20:00

Solution 1 by Tejas Vaishnav is very good. I would provide another linq query:

C#

DateTime[] dt = {new DateTime(2013,12,12), new DateTime(2013,12,12),
                new DateTime(2013,12,12), new DateTime(2013,12,12),
                new DateTime(2014,01,01), new DateTime(2014,01,02),
                new DateTime(2013,12,12), new DateTime(2013,11,11),
                new DateTime(2013,11,11), new DateTime(2013,10,10) };

var uniques = dt.GroupBy(g=>g).Where(g=>g.Count()>=1).Select(g=>g.Key);
foreach (DateTime d in uniques)
{
    Console.WriteLine(d.ToString());
}
Console.ReadKey();

Distinct method[^] is - of course - an easiest (and fastest?) way.

To select only duplicates, change Where statement:

C#

Where(g=>g.Count()>1)

To select uniques values (non-duplicates), change Where statement:

C#

Where(g=>g.Count()==1)

how to compare dates in one array

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