What is the best way to deepcopy a list, I am usin...

# getting-started

[am]

What is the best way to deepcopy a list, I am using the following way

studentList.forEach {
if(it.id ==student.id){
list.add(it.copy(isFailed = false))
}else{
list.add(it)
}
}

[KamilH]

You can also use map:

val newList = studentList.map {
    if (it.id == student.id) {
        it.copy(isFailed = false)
    } else {
        it
    }
}

[am]

Is there any performance implication as forEach does not return any list its a plain void
whereas map transforms a list

[zhuinden]

you are already creating a new list above your forEach anyway, so no