Duplicate

Q1: Write a code to remove the duplicates from array of integer which as 1000 integers init. 

Q2: Given a list of strings, find all duplicates and their counts.

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Q1: Write a code to remove the duplicates from array of integer which as 1000 integers init. 

Answe:

static void Main(string[] args)

        {

           //Write a code to remove the duplicates from array of integer which as 1000 integers init. 

var arrayobj = new int[] { 1, 3, 5, 7, 9, 3, 5, 6, 3, 7, 9, 2, 5, 9, 4, 6, 8, 3, 2, 1, 9};

var removeduplicate = arrayobj.DistinctBy(x => x).ToArray();

           

        }

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Q2: Given a list of strings, find all duplicates and their counts.

Answer:

internal class Program

{

    static void Main(string[] args)

    {

        // Q: Given a list of strings, find all duplicates and their counts.

        var strlist = new List<string>() { "apple", "bat", "cat", "apple", "bat", "bat", "rat", "cat" };

        var objdictionary = strlist

            .GroupBy(x => x)

            .OrderBy(g=>g.Count())

            .ToDictionary(g => g.Key, g => g.Count());

        foreach (var item in objdictionary)

        {

            Console.WriteLine("Word, Count  is " + item.Key + ", " + item.Value);

        }

    }

}

Palindrome

 Q: Write a code to check whether a string is palindrome or not?

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public void PalindrometrickOne()

{

    //string word = "MADAMPO";

    string word = "MADAM";

    int wordlength = word.Length;

    // forloop and check i and length - i character are same or not

    for (int i = 0; i < wordlength / 2; i++)

    {

        if (word[i] != word[wordlength - 1 - i])

        {

            // if for once its not, exit the loop and give error .

            Console.WriteLine("Word is not palindrom");

            return; //it will be exit form the whole method. 

        }

    }

    // reach only if 'return' never get executed. 

    Console.WriteLine("The given word is palindrome");

}