Kotlin .remove()

The .remove() method is used to remove a key-value pair from a HashMap in Kotlin.

Syntax

fun <K, V> MutableMap<K, V>.remove(key: K): V?

It takes one parameter and returns:

• key: the key of the key-value pair to be removed
• V? : the value associated with the removed key or null if the key is not found in the map.

Example

Here is an example of how to use the .remove() method in a Kotlin program:

fun main(){
  val myMap = hashMapOf("key1" to "value1", "key2" to "value2")
  val removedValue = myMap.remove("key1")
  print(myMap)
}

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The output for the above code will be:

{key2=value2}