Remove duplicate characters from String?

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https://technicalrawatg.blogspot.com/2019/06/remove-duplicate-characters-fromstring.html

Remove duplicate characters from String?

A string Can Contained two or more character in it, but we want to have only one
For Example
Required input and output
Input: Csharpstar
Output: Csharpt
Input: Ganga
Output: Gang
Input: Yahoo
Output: Yaho
Input: ganga
Output: gan
Solution:

You can achieve this by two ways 

1.     Using index of method IndexOf(ch)


Step 1:
public string RemoveDuplicateChar(String Str)
        {
            string result = "";
            Str = Str.ToUpper();
            foreach (char value in Str)
            {
                // See if character is in the table.
                if (result.IndexOf(value) == -1)
                {
                result += value;
                }
            }
            return result;
        }

static void Main(string[] args)
        {

            String Name = "Ganga";
            Program obj = new Program();
            //Console.WriteLine("Total Duplicate value"+ obj.DuplicateChar(Name));
Console.WriteLine("New String = " + obj.RemoveDuplicateChar(Name));
            Console.ReadLine();
        }


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Count duplicate characters from String?

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Count duplicate characters from String?

A string Can Contained two or more character in it, but we want to have only one
For Example
Required input and output
Input: Csharpstar
Output: Csharpt
Input: Ganga
Output: Gang
Input: Yahoo
Output: Yaho
Input: ganga
Output: gan
Solution:
You can achieve this by two ways 
1.     One by for loop
2.     Using index of method IndexOf(ch)





Step 1:
public string DuplicateChar(String Str)
        {
            int Count = 0;
            //Str = Str.ToUpper();
            for (int i = 0; i <= Str.Length - 1; i++)
            {
                for(int j=i+1;j<=Str.Length-1;j++)
                {
                    if (Str[i] == Str[j])
                    {
                        Count++;

                    }
                }
            }

            return Count.ToString();
        }
static void Main(string[] args)
        {

            String Name = "Ganga";
            Program obj = new Program();
            Console.WriteLine("Total Duplicate value"+ obj.DuplicateChar(Name));
            Console.ReadLine();
        }
Step 2:
public string DuplicateCharCount(String Str)
        {
            string repeat = "";
            int No = 0;
           // Str = Str.ToUpper();
            foreach (Char ch in Str)
            {
               
                if (repeat.IndexOf(ch) == -1)
                {
                    No++;
                }
                repeat += ch;
            }
            return(Str.Length- No).ToString();
        }



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How to remove Duplicate Value from an Unsorted Array

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Remove Duplicate Value from an Unsorted Array


How to remove Duplicate Value from an Array

Array
7
8
6
1
1
3
2
2
7
6
3
8
7


Above is Unsorted Array
Output Should be
1
2
3
6
7
8









Solution

Step 1: You have Unsorted Array, Now sort the Array
Step 2: You can use Array.Sort(Name of Array ) method to sort the array / or simply by code

1
1
2
2
3
3
6
6
7
7
7
8
8

Step 3 : Take a Temp Array to store the distinct value in array
The logic behind the find distinct value is
Check pointed value to next value  i.e Array1[1] = 7and Array1[1]= 1and

If both value not equal, then store in new array
1
2
3
6
7
8









            int[] array1 = { 7,8,6,1,1,3,2,2,7,6,3,8,7 };
            Array.Sort(array1);
            array1.Reverse();
            int[] NewArr = new int[array1.Length];
            int n,j = 0;
            for (int i = 0; i <= array1.Length - 2; i++)
            {
                if (array1[i] != array1[i + 1])
                {
                    NewArr[j] = array1[i];
                    j++;
                }
            }
            NewArr[j] = array1[array1.Length - 1];

            for (n = 0; n <= j; n++)
            {
                Console.WriteLine("New array " + NewArr[n]);
            }
           
                   
            Console.ReadLine();



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