how do find the same string and difference string in List<string>?-CodePudding

I have list like this:

List<string> myList = new List<string>() 
{
    "AS2258B43C014AI9954803",
    "AS2258B43C014AI9954603",
    "AS2258B43C014AI9954703",
    "AS2258B43C014AI9954503",
    "AS2258B43C014AI9954403",
    "AS2258B43C014AI9954203",
    "AS2258B43C014AI9954303",
    "AS2258B43C014AI9954103",
 };

I want to output something format is sameString diffString0\diffString1\diffString2.... like this "AS2258B43C014AI9954803\603\703\503\403\203\303\103"

what should I do?

CodePudding user response：

after that you can find the difference

CodePudding user response：

The simplest solution is to create a function like this :

public static string Output(List<String> ListString)
{
  string sameString = ListString.First().Substring(0, 18);
  string output = sameString;
  foreach (var item in ListString)
  {
    output  = item.Substring(19);
    output  = "\\";
  }

  return output.Substring(0, output.Length - 1);
}

CodePudding user response：

You can create a method which returns you the difference between to strings:

private static string GetDiff (string s1, string s2)
    {
        int i;
        for(i = 0; i < Math.Min(s1.Length,s2.Length); i  )
        {
            if(s1[i] != s2[i])
            {
                break;
            }
        }
        return s2.Substring(i);
    }

This method iterats until the first character which is different and returns the remaining characters of the second string.

With that method, you can obtain your result with the LINQ query:

string first = myList[0];
string result = first   "/"   string.Join("/", myList.Skip(1).Select(x => GetDiff(first,x)));

Online demo: https://dotnetfiddle.net/TPkhmz