toNotEmptySet
@Since(version = KotoolsTypesVersion.V4_0_0)
Returns an encapsulated NotEmptySet containing all the elements of this collection, or returns an encapsulated IllegalArgumentException if this collection is empty.
Calling from Kotlin
Here's an example of calling this function from Kotlin code:
var collection: Collection<Int> = setOf(1, 2, 3, 1)
var notEmptySet: NotEmptySet<Int>? = collection.toNotEmptySet()
.getOrNull()
assertNotNull(notEmptySet)
collection = emptySet()
notEmptySet = collection.toNotEmptySet()
.getOrNull()
assertNull(notEmptySet)
Content copied to clipboard
Please note that changes made to the original collection will not be reflected on the resulting NotEmptySet.
val original: MutableCollection<Int> = mutableSetOf(1, 2, 3)
val notEmptySet: NotEmptySet<Int> = original.toNotEmptySet()
.getOrThrow()
assertEquals(expected = "$original", actual = "$notEmptySet")
original.clear()
assertNotEquals(illegal = "$original", actual = "$notEmptySet")
Content copied to clipboard