Question drop down select for an item of an array in inspector

i have an array which im populating in the inspector,
and a script is picking an element from this using a string identifier provided in the inspector.

what i want is, a drop down that populates itself with the items in the array, as mentioned im using strings right now but id like a drop down or just the ability to pick an element from the array.

can use enums but i dont wanna update the enum everytime i add an element in the array.
any help?

 

The Popup-Object can also work with an array of string instead of an enum:

https://docs.unity3d.com/ScriptReference/EditorGUILayout.Popup.html

 

The previous answer assumes that you write your own inspector. You can also write your own custom drawer, which is easier for your case, however there is a lot to unpack whichever path you choose. Writing a custom drawer is relatively easy once you find a decent template. You can check out this solution of mine I shared here not so long ago. It is more broad, but features a custom popup drawer. (You can also download the source in post #12)