In Scala, we can get the size of a hash by using the size method. Here is an example:
// create a hash map
val hashMap = Map("John" -> 25, "Jane" -> 30, "Jim" -> 35)
// get the size of the hash map
val mapSize = hashMap.size
println(mapSize) // output: 3
In this example, we first create a hash map with three key-value pairs. Then, we use the size method to get the size of the hash map, which is 3.
We can also get the size of a hash set using the size method. Here is an example:
// create a hash set
val hashSet = Set("Apple", "Orange", "Banana", "Apple")
// get the size of the hash set
val setSize = hashSet.size
println(setSize) // output: 3
In this example, we create a hash set with four elements (including a duplicate element "Apple"). We use the size method to get the size of the hash set, which is 3 (because the set only contains three unique elements).