.filterNot()

The .filterNot() method will filter elements from a Kotlin sequence based on whether or not the same element is present in the given predicate.

Syntax

String.filterNot(predicate)

-String: The collection of elements to be filtered. -predicate: The collection of elements to be filtered out.

Example

The example demonstrates the use of .filterNot() to remove any pairs in the map with a value less than 2, and then to filter out any pairs with the key c.

fun main() {
  val originalMap = mapOf("a" to 1, "b" to 2, "c" to 3)

  val filteredMap = originalMap.filterNot(it.value < 2)
  println(filteredMap)

  val filteredMap2 = originalMap.filterNot(it.key == "c")
  println(filteredMap2)
}

The output of this code will be:

{b=2, c=3}
{a=1, b=2}