To remove a key-value pair from a map in Kotlin, you can use the remove method. This method allows you to remove the key-value pair associated with the specified key.
We can remove a key-value pair from a map in Kotlin using the remove method, which removes the key-value pair associated with the specified key.
For example,
myMap
with some key-value pairs. In this example, the map has string keys and integer values.remove
method to remove the key-value pair associated with the key 'two'
. The remove
method removes the key-value pair from the map.println
function to verify that the key-value pair has been removed.fun main() {
// Declare and initialize a mutable map
val myMap: MutableMap<String, Int> = mutableMapOf(
"one" to 1,
"two" to 2,
"three" to 3
)
// Remove a key-value pair using remove method
myMap.remove("two")
// Print the contents of the map
println(myMap)
}
{one=1, three=3}
We can handle the case where a key is not found in a map in Kotlin using the remove method, which returns null if the key is not present.
For example,
myMap
with some key-value pairs. In this example, the map has string keys and integer values.remove
method to attempt to remove the key-value pair associated with the key 'four'
. The remove
method returns null if the key is not found.println
function to verify that the map is unchanged.fun main() {
// Declare and initialize a mutable map
val myMap: MutableMap<String, Int> = mutableMapOf(
"one" to 1,
"two" to 2,
"three" to 3
)
// Attempt to remove a non-existent key-value pair using remove method
myMap.remove("four")
// Print the contents of the map
println(myMap)
}
{one=1, two=2, three=3}
We can remove multiple key-value pairs from a map in Kotlin using the remove method, which removes the key-value pairs associated with the specified keys.
For example,
myMap
with some key-value pairs. In this example, the map has string keys and integer values.remove
method to remove the key-value pairs associated with the keys 'one'
and 'three'
. The remove
method removes the key-value pairs from the map.println
function to verify that the key-value pairs have been removed.fun main() {
// Declare and initialize a mutable map
val myMap: MutableMap<String, Int> = mutableMapOf(
"one" to 1,
"two" to 2,
"three" to 3
)
// Remove multiple key-value pairs using remove method
myMap.remove("one")
myMap.remove("three")
// Print the contents of the map
println(myMap)
}
{two=2}
In this tutorial, we learned How to Remove a Key-Value Pair from a Map in Kotlin language with well detailed examples.