I have a string with 3 names(example: string name="Hunter Georgie Martin"). I have 3 tasks for that string:

1. remove the first name
2. remove the second name
3. remove the third name

They don't depend on each other, meaning when deleting first name for the first task it shouldn't also be removed when doing the other tasks.

I completed the first task:

string name = "Hunter Gregorie Martin";//example
string str = name.Substring(name.IndexOf(' ') 1);
Console.WriteLine(str);

The output is what it should be: Gregorie Martin

The problem is that I can't think of a way to finish the other tasks in a similar way.

CodePudding user response：

This simple function can be used for all three of your examples by utilizing System.Linq.

public string RemoveNameIndexFromString(string name, int indexToRemove, char separator = ' ')
{
    // Split the original string by the separator character
    string[] names = name.Split(separator);

    // Check if the index to remove is valid
    if (indexToRemove < 0 || indexToRemove >= names.Length)
        return "Invalid index";

    // Create a new array with the name at the specified index removed
    var newNames = names.Where((val, idx) => idx != indexToRemove).ToArray();

    // Join the remaining names back together using the separator character
    return string.Join(separator.ToString(), newNames);
}

Usage

Console.WriteLine(RemoveNameIndexFromString("Hunter Gregorie Martin", 0));
Console.WriteLine(RemoveNameIndexFromString("Hunter Gregorie Martin", 1));
Console.WriteLine(RemoveNameIndexFromString("Hunter Gregorie Martin", 2));

Output

Gregorie Martin
Hunter Martin
Hunter Gregorie

CodePudding user response：

Very similar to what GrumpyCrouton (great name!) did, but with a List instead:

  public string RemoveNameIndexFromString(string name, int indexToRemove)
  {
      List<String> names = new List<String>(name.Split(' '));
      if (indexToRemove >=0 && indexToRemove < names.Count) {
        names.RemoveAt(indexToRemove);  
      }
      return String.Join(" ", names);
  }

CodePudding user response：

Riff on GrumpyCrouton's answer using Take and Skip (taking all items before desired index and concatenating with items after the index) instead of Where (which skips the item). Also packing everything into single statements using IIFE as many people are concerned about number of statements (vs. readability)

string RemoveNameIndexFromString(string v, int idx) => 
    ((Func<string[], string>)(r => 
        String.Join(" ",r.Take(idx).Concat(r.Skip(idx 1)))))(v.Split());

Less crazy version without IIFE would need to split twice but more readable:

string RemoveNameIndexFromString(string v, int idx) => 
    String.Join(" ",v.Split().Take(idx).Concat(v.Split().Skip(idx 1)));

CodePudding user response：

Assuming that you do not want not use fancy C# features and functions, you can do it with Substring and IndexOf alone by applying IndexOf again to the middle name last name string.

string name = "Hunter Gregorie Martin";
Console.WriteLine("Name = "   name);

int index = name.IndexOf(' ');
string firstName = name.Substring(0, index);
string middleAndLastName = name.Substring(index   1);

index = middleAndLastName.IndexOf(' ');
string middleName = middleAndLastName.Substring(0, index);
string lastName = middleAndLastName.Substring(index   1);

Console.WriteLine("First  name removed = "   middleAndLastName);
Console.WriteLine("Middle name removed = "   firstName   " "   lastName);
Console.WriteLine("Last   name removed = "   firstName   " "   middleName);

prints

Name = Hunter Gregorie Martin
First  name removed = Gregorie Martin
Middle name removed = Hunter Martin
Last   name removed = Hunter Gregorie

Just be creative!