Scala updating/creating value in a hashmap
- by user1672739
I don't understand this with Scala hasmaps:
How do I create a value or update one if it does not exist?
I am tryng to count the number of characters in a list of Strings.
I've tried this code but it doesn't work :
def times(chars: List[Char]): List[(Char, Int)] = {
val map = new HashMap[Char, Int]()
chars.foreach(
(c : Char) => {
map.update(c, map.get(c) + 1)
})
}
I understand the returning type isn't correct.
But is my foreach loop wrong?
Is there a prettier way to write it?
