how to avoid ConcurrentModificationException kotlin

That’s a common problem with the JVM, if you want to remove an item from a collection while iterating through it, you need to use the Iterators

exemple:

val myCollection = mutableListOf(1,2,3,4)
val iterator = myCollection.iterator()
while(iterator.hasNext()){
    val item = iterator.next()
    if(item == 3){
        iterator.remove()
    }
}

this will avoid ConcurrentModificationExceptions

I hope this answered your question, have a good day

Edit: you can find another explanation here, even if it is Java code the problem is the same
Edit n°2 the anwser of leonardkraemer show you a more kotlin-friendly way to do so