kotlin-stdlib/kotlin.collections/indexOf

indexOf

fun <T> Array<out T>.indexOf(element: T): Int
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fun ByteArray.indexOf(element: Byte): Int
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fun ShortArray.indexOf(element: Short): Int
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fun IntArray.indexOf(element: Int): Int
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fun LongArray.indexOf(element: Long): Int
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@DeprecatedSinceKotlin(warningSince = "1.4")
fun FloatArray.indexOf(element: Float): Int
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@DeprecatedSinceKotlin(warningSince = "1.4")
fun DoubleArray.indexOf(element: Double): Int
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fun BooleanArray.indexOf(element: Boolean): Int
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fun CharArray.indexOf(element: Char): Int
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Returns first index of element, or -1 if the array does not contain element.


fun <T> Iterable<T>.indexOf(element: T): Int
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Returns first index of element, or -1 if the collection does not contain element.


fun <T> List<T>.indexOf(element: T): Int
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Returns first index of element, or -1 if the list does not contain element.


@ExperimentalUnsignedTypes
inline fun UIntArray.indexOf(element: UInt): Int
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@ExperimentalUnsignedTypes
inline fun ULongArray.indexOf(element: ULong): Int
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@ExperimentalUnsignedTypes
inline fun UByteArray.indexOf(element: UByte): Int
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@ExperimentalUnsignedTypes
inline fun UShortArray.indexOf(element: UShort): Int
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Returns first index of element, or -1 if the array does not contain element.

Since Kotlin

1.3