add

Common
JVM
Native
1.0
abstract fun add(element: E): Boolean
For JVM

Adds the specified element to the set.

This method is redeclared as abstract, because it's not implemented in the base class, so it must be always overridden in the concrete mutable collection implementation.

Return true if the element has been added, false if the element is already contained in the set.

For Common

Adds the specified element to the collection.

Return true if the element has been added, false if the collection does not support duplicates and the element is already contained in the collection.

For Native

Adds the specified element to the set.

Return true if the element has been added, false if the element is already contained in the set.