Deduplicated List Method

[PaulMohn]

ref. https://forum.ninjatrader.com/forum/...oubles-in-list

        List<double> DeDuplList(List<double> _List)
        {                      
            if (_List.Count < 1)
                return new List<double>();
            
            for (int i = 0 ; i < _List.Count -1 ; i++)
            {      
                double st1  = _List[i+1];
                double nd2  = _List[i];
                
                if (st1 == nd2)
                {
                    _List.Remove(st1);
                }
            }
            
            return _List;
        }&#8203; 

Tested ok:

https://dotnetfiddle.net/iBxrlu

using System;
using System.Collections.Generic;
                    
public class Program
{
    public static void Main()
    {
        List<double> duplList = new List<double> {1.1, 2.2, 2.2, 3.3, 4.4, 5.5, 5.5, 6.6, 7.7};
        
        Console.WriteLine(" ");
        
        for (int i = 0; i < duplList.Count; i++)
        {
            Console.WriteLine("DuplList List Items indices: " + i + " DuplList List Items: " + duplList[i]);
        }
        
        List<double> DeDuplList(List<double> _List)
        {                      
            if (_List.Count < 1)
                return new List<double>();
            
            for (int i = 0 ; i < _List.Count -1 ; i++)
            {      
                double st1  = _List[i+1];
                double nd2  = _List[i];
                
                if (st1 == nd2)
                {
                    _List.Remove(st1);
                }
            }
            
            return _List;
        }
        
        duplList = DeDuplList(duplList);
        
        Console.WriteLine(" ");
        
        for (int i = 0; i < duplList.Count; i++)
        {
            Console.WriteLine("DeDuplList List Items indices: " + i + " DeDuplList List Items: " + duplList[i]);
        }
    }
}&#8203; 

Output:

DuplList List Items indices: 0 DuplList List Items: 1.1
DuplList List Items indices: 1 DuplList List Items: 2.2
DuplList List Items indices: 2 DuplList List Items: 2.2
DuplList List Items indices: 3 DuplList List Items: 3.3
DuplList List Items indices: 4 DuplList List Items: 4.4
DuplList List Items indices: 5 DuplList List Items: 5.5
DuplList List Items indices: 6 DuplList List Items: 5.5
DuplList List Items indices: 7 DuplList List Items: 6.6
DuplList List Items indices: 8 DuplList List Items: 7.7

DeDuplList List Items indices: 0 DeDuplList List Items: 1.1
DeDuplList List Items indices: 1 DeDuplList List Items: 2.2
DeDuplList List Items indices: 2 DeDuplList List Items: 3.3
DeDuplList List Items indices: 3 DeDuplList List Items: 4.4
DeDuplList List Items indices: 4 DeDuplList List Items: 5.5
DeDuplList List Items indices: 5 DeDuplList List Items: 6.6
DeDuplList List Items indices: 6 DeDuplList List Items: 7.7

ref. Callable list method

https://stackoverflow.com/a/8016258/10789707

Return empty list

https://stackoverflow.com/a/23008069/10789707

[PaulMohn]

Initial version without List Method:

using System;
using System.Collections.Generic;
                    
public class Program
{
    public static void Main()
    {
        List<double> duplList = new List<double> {1.1, 2.2, 2.2, 3.3, 4.4, 5.5, 5.5, 6.6, 7.7};
        
        Console.WriteLine(" ");
        
        for (int i = 0; i < duplList.Count; i++)
        {
            Console.WriteLine("DuplList List Items indices: " + i + " DuplList List Items: " + duplList[i]);
        }
            
        for (int i = 0 ; i < duplList.Count -1 ; i++)
        {      
            double st1  = duplList[i+1];
            double nd2  = duplList[i];

            if (st1 == nd2)
            {
                duplList.Remove(st1);
            }
        }
        
        Console.WriteLine(" ");
        
        for (int i = 0; i < duplList.Count; i++)
        {
            Console.WriteLine("DeDuplList List Items indices: " + i + " DeDuplList List Items: " + duplList[i]);
        }
    }
}&#8203; 

Output:

DuplList List Items indices: 0 DuplList List Items: 1.1
DuplList List Items indices: 1 DuplList List Items: 2.2
DuplList List Items indices: 2 DuplList List Items: 2.2
DuplList List Items indices: 3 DuplList List Items: 3.3
DuplList List Items indices: 4 DuplList List Items: 4.4
DuplList List Items indices: 5 DuplList List Items: 5.5
DuplList List Items indices: 6 DuplList List Items: 5.5
DuplList List Items indices: 7 DuplList List Items: 6.6
DuplList List Items indices: 8 DuplList List Items: 7.7

DeDuplList List Items indices: 0 DeDuplList List Items: 1.1
DeDuplList List Items indices: 1 DeDuplList List Items: 2.2
DeDuplList List Items indices: 2 DeDuplList List Items: 3.3
DeDuplList List Items indices: 3 DeDuplList List Items: 4.4
DeDuplList List Items indices: 4 DeDuplList List Items: 5.5
DeDuplList List Items indices: 5 DeDuplList List Items: 6.6
DeDuplList List Items indices: 6 DeDuplList List Items: 7.7

Tested ok:

https://dotnetfiddle.net/RdKTV8