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Merge pull request #9546 from alimate/BAEL-4309 

BAEL-4309: Invoke Operator Function
This commit is contained in:
Eric Martin 2020-06-26 19:31:56 -05:00 committed by GitHub
parent 3b3013bfb0 02ec5e5a8d
commit b28a4dac7e
2 changed files with 6 additions and 0 deletions
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1
core-kotlin-modules/core-kotlin-lang/src/main/kotlin/com/baeldung/operators/Page.kt
View File

@ -6,6 +6,7 @@ interface Page<T> {
fun elements(): MutableList<T> fun elements(): MutableList<T>
} }
operator fun <T> Page<T>.invoke(index: Int): T = elements()[index]
operator fun <T> Page<T>.get(index: Int): T = elements()[index] operator fun <T> Page<T>.get(index: Int): T = elements()[index]
operator fun <T> Page<T>.get(start: Int, endExclusive: Int): List<T> = elements().subList(start, endExclusive) operator fun <T> Page<T>.get(start: Int, endExclusive: Int): List<T> = elements().subList(start, endExclusive)
operator fun <T> Page<T>.set(index: Int, value: T) { operator fun <T> Page<T>.set(index: Int, value: T) {

5
core-kotlin-modules/core-kotlin-lang/src/test/kotlin/com/baeldung/operators/PageTest.kt
View File

@ -14,6 +14,11 @@ class PageTest {
assertEquals(page[1, 3], listOf("Kotlin", "Scala")) assertEquals(page[1, 3], listOf("Kotlin", "Scala"))
} }
@Test
fun `Invoke convention should work as expected`() {
assertEquals(page(1), "Kotlin")
}
@Test @Test
fun `In convention should work on a page as expected`() { fun `In convention should work on a page as expected`() {
assertTrue("Kotlin" in page) assertTrue("Kotlin" in page)