Get GameObject from List based on attached script or assigned name

Question

Hi, I was wondering if there was any way to identify an script-created GameObject based on its attached script OR its assigned name in a list. For example:

 newEntry = new GameObject("FirstEntry");
 newEntry.AddComponent<EntryScript>();
 newEntry.GetComponent<EntryScript>().ID = 1;
 entryList.Add(newEntry);
 
 newEntry = new GameObject("SecondEntry");
 newEntry.AddComponent<EntryScript>();
 newEntry.GetComponent<EntryScript>().ID = 2;
 entryList.Add(newEntry);
 
 
 entryList.Remove(?);

If I wanted to remove only FirstEntry, how would I go about that? Im trying to dynamically create a LOT of GameObjects (some different, some duplicates) and save them in lists, but I'm not sure how to identify them after I add them. entryList.Remove(newEntry) logically only removes the last added newEntry.

Answer 1

Best Answer

Answer by RudyTheDev · Mar 09, 2016 at 10:10 PM

What @BackslashOllie posted, but with break; and == (also in descriptive method for cleaner code):

 private void RemoveFirstEntryWithID(int id)
 {
     for (int i = 0; i < entryList.Count; i++)
     {
         if (entryList[i].GetComponent<EntryScript>().ID == id)
         {
             entryList.RemoveAt(i);
             break; // jumps out of the for loop after entry removal
             //i--; would go here if we didn't break
         }
     }
 }

By the way, consider making your entryList to List<EntryScript> entryList instead if it's applicable, so you can do:

 newEntry = new GameObject("FirstEntry").AddComponent<EntryScript>();
 newEntry.ID = 1;
 entryList.Add(newEntry);

 newEntry = new GameObject("SecondEntry").AddComponent<EntryScript>();
 newEntry.ID = 2;
 entryList.Add(newEntry);

And then simply if (entryList[i].ID == id).

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Brokenarrow · Mar 10, 2016 at 01:19 PM 0

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All great suggestions! Adding break; was exactly what I needed to get what I want. Thanks for all the help.

Answer 2

Answer by BackslashOllie · Mar 09, 2016 at 07:08 PM

Can you not do this?

 for (int i = 0; i < entryList.Count; i++)
 {
     if (entryList[i].GetComponent<EntryScript>().ID = 1)
         entryList.RemoveAt(i);
 }

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maestroxxx · Mar 09, 2016 at 07:52 PM 0

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 if (entryList[i].GetComponent<EntryScript>().ID == 1)

Also run over a reference copy of the list otherwise you might get problem if you remove an item from the list while still iterating over it.

Brokenarrow maestroxxx · Mar 09, 2016 at 08:49 PM 0

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Yes I've been experimenting with a for loop: but I can't get exactly the results I want. I should have been more clear: I want to be able to remove 1 GameObject with a certain ID from the entryList. Thus if I have an entryList with:

FirstEntry (ID = 1) FirstEntry (ID = 1) SecondEntry (ID = 2) FirstEntry (ID = 1)

I want to be able to remove 1 FirstEntry GameObject (for example). With all for/foreach loops I've tried I end up removing all items with a specific ID. Maybe I should first put all items with a certain ID in a seperate list, then remove one and put the remaining back in the original list? Thanks for the suggestion though, I appreciate the help.

Answer 3

Answer by MalzanFaren · Mar 10, 2016 at 09:15 AM

Put "break" after the RemoveAt to stop the for loop iterating again if it has performed a removal. For example:

 if (check ID){
      entryList.RemoveAt(i);
      break;
 }

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Get GameObject from List based on attached script or assigned name

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