Kotlin how to return a SINGLE object from a list that contains a specific id?

Question

Good day, i\'m stuck figuring out how to get a single object from a list, i did google but all the topics show how to return a List with sorted objects or somet

Answer 1

You can use this extension function also which return pair Pair(Boolean,T)

e.g

val id=2
val item= myList.customContains{it-> it.userId ==id}

if(item.first){
item.second  //your object
//    your code here
}else{
// if item no present
}




fun  List.customContains(function: (currentItem: E) -> Boolean): Pair {
        for (current in 0 until this.size) {
            if (function(this[current])) {
                return Pair(true, this[current])
            }
        }
        return Pair(false, null)
    }