scala Remove (in place) all elements of a ListBuffer that meet a condition

Question

I have a ListBuffer. I want to remove all elements that meet a certain condition.

I could iterate over it and remove each element. But what doe Scala say about mutating

Answer 1

You could combine the two and do the following:

val lb = ListBuffer(1,2,3,4,5,6)
lb --= lb.filter(_ % 2 == 0)

println(lb)
// outputs: ListBuffer(1, 3, 5)