find the value from an array which is repeated most times

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hi
can any one tell, the best way to find a value from an array which is repeated most times

ex
string[] array = new string[] {"1","2","2","3","3","4","2","3","4","4","2","2",};

Expect Ans: 2

Posted 7-Jul-12 0:01am

PriyaRajavelu

Updated 7-Jul-12 0:04am

v2

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2 solutions

Solution 2

Well this is maybe a not the most elegant solution but it does the job:

C#

public string GetMaxElementCount(string[] array)
{
    List<string> list = new List<string>(array);
    IEnumerable<IGrouping<string, string>> g = list.GroupBy(i => i);

    int countMax = 0;
    string keyMax = string.Empty;

    foreach (IGrouping<string, string> grp in g)
    {
        int count = grp.Count();
        if (countMax < count)
        {
            countMax = count;
            keyMax = grp.Key;
        }

    }

    return keyMax;
}

Cheers

Posted 7-Jul-12 1:01am

Mario Majčica

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OriginalGriff · Accepted Answer · 2012-07-07T00:08:00

Solution 1

"Best" in what sense?
There are a huge variety of ways to do this, a few of which are:
1) A foreach loop, counting occurrences into a separate array or Dictionary. Then sort the instances my count, and take the top value.
2) A Linq Query to do the same.
3) Sort the original array, then loop though, counting occurrences and picking the largest as you go.

Which way would I do it? Depends on what the data to check was, and how many of them there were.

"Best" is a subjective word - it can mean "fastest", "smallest", "clearest", "most understandable" or even "least understandable so no-one else will touch it".

Posted 7-Jul-12 0:08am

OriginalGriff

Comments

OriginalGriff 7-Jul-12 6:24am

We do not do your homework: it is set for a reason. It is there so that you think about what you have been told, and try to understand it. It is also there so that your tutor can identify areas where you are weak, and focus more attention on remedial action.

Try it yourself, you may find it is not as difficult as you think!

Mohd Imran Saifi 7-Jul-12 6:28am

i also agree with Orginal giff.
use the Third type . just sorting the array, then check redundency of every value. pick the largest redundant value.
This is the Best logic Which OriginalGriff is metion. Write the code by yourself.