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Question by jeppe79 · Oct 05, 2020 at 08:28 AM · parentchild

The most resource efficient way to dynamically find specific child in parent?

Hello, I have a >1000 parent GameObject and each has 5 child GameOjects with same names (title, description, author, year, rating) and need to dynamically return a specific child. What would be the most resource efficient way to do this?

I am thinking that maybe parentgameobject.transform.Find("ChildName") isn't such a bad idea in this use case, since from what I understand, it would only loop the 5 child objects and return on the first match, and not the whole scene hierarchy (true?), but I would like to hear opinions and suggestions on this.

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Answer by Inanoglu · Oct 05, 2020 at 08:48 AM

My suggest is use tags. Give tags to your objects and find them

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avatar image jeppe79 · Oct 05, 2020 at 09:49 AM 0
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Thank you, I forgot to mention that there are more than 1000 parents (I updated the question now). But I did some investigating and it seems there is no FindChildrenWithTag equivalent. But I did find an extension someone did at: https://gist.github.com/Ashwinning/551ab77201e89a352bff

Since FindWithTag will loop through all tags, I suppose this is needed in this use case.

Question in this is, is this more efficient than

parentgameobject.transform.Find("ChildName")

 public static Transform[] FindChildrenWithTag(this Transform trans, string tag)
     {
         Transform[] kids = trans.GetComponentsInChildren<Transform> ();
         Transform[] kidsWithTag = new Transform[] {};
         foreach (Transform kid in kids) 
         {
             if (kid.tag == tag) 
             {
                 kidsWithTag [kidsWithTag.Length] = kid;
             }
         }
         return kidsWithTag;
     }


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