How can i match two different List?-CodePudding

I have 2 GameObject and each other has a lot of child. This two GameObject same as same except some child's exist or child's position. I found each child's name. And also I found locations info for each item. Then I compared this Lists and i found relocated, exist, added and removed items. I want to match with relocated items with names. How can I do that?

On Project1

List<string> existItems = GetNames().Intersect(revisedBasicProject4.GetNames4()).ToList();
List<Vector3> comparePosition = GetLocations().Except(revisedBasicProject4.GetLocations()).ToList();

        foreach (var item in existItems)
        {
            isExist = true;
        }

        if (isExist)
        {
            foreach (var item in comparePosition)
            {
                    Debug.Log("RELOCATED ITEMS :"  item);
            }
        }

CodePudding user response：

I do not know if I understood what you meant correctly or not, but you can use the following code

    List<string> existItems = GetNames().Intersect(revisedBasicProject4.GetNames4()).ToList();
    List<Vector3> comparePosition = GetLocations().Except(revisedBasicProject4.GetLocations()).ToList();

    foreach (var item in existItems)
        foreach (var li in comparePosition)
            if (item.(...) == li.(...)) {
                Debug.Log("RELOCATED ITEMS :"   item);
            }

CodePudding user response：

Following on from https://stackoverflow.com/users/7111561/derhugo and https://stackoverflow.com/users/13922490/mohammad-asadi - You want to store names and locations together, perhaps in a simple struct:

public struct NamedPosition
{
    string Name;
    Vector3 Position;
}

Then, you can compare your revisedBasicProject4 positions/names with the current class like so:

foreach(var namedPosition in GetNamedPositions())
{
    foreach(var revisedBasicProject4NamedPosition in revisedBasicProject4.GetNamedPositions())
    {
        if ( namedPosition.Name == revisedBasicProject4.Name 
             && namedPosition.Position != revisedBasicProject4.Position)
        {
            Debug.Log("RELOCATED ITEM : "   namedPosition.Name);
        }
    }
}

If you find this is taking forever (because you have millions of NamedPositions, you may be able to optimise this by doing the following:

var namedPositions = new List<NamedPosition>(GetNamedPositions());
var otherNamedPositions = new List<NamedPosition>(revisedBasicProject4.GetNamedPositions());

for(var i = 0; i < namedPositions.Count; i  )
{
    for(var j = 0; j < otherNamedPositions.Count; j  )
    {
        if ( namedPositions[i].Name == otherNamedPositions[j].Name )
        {
            if ( namedPositions[i].Position != otherNamedPositions[j].Position )
                Debug.Log("RELOCATED ITEM : "   namedPosition.Name);
            otherNamedPositions.RemoveAt(j); //We found it so remove it from our temporary "otherNamedPositions" list
            break; //We found it so move on to the next "namedPositions" item
        }
    }
}