I cannot find a way to get the index position of a value in the array. It’s weird because it’s so simple. The array index should have its value and we should be able to search either by value or by index position. But we can’t.

With loop I couldn’t figure out how it works.

So I made a new system by modifying the array 3 times.

First modify array (prepend value)
Second delete duplicates
Third delete first value

Like that, I can erase something from the array.

Do you know a better way to do that? I mean a proper way to do that?