indexOf
fun BooleanArray.indexOf(v: Boolean, startOffset: Int = 0, endOffset: Int = this.size, default: Int = -1): Int
fun ByteArray.indexOf(v: Byte, startOffset: Int = 0, endOffset: Int = this.size, default: Int = -1): Int
fun ShortArray.indexOf(v: Short, startOffset: Int = 0, endOffset: Int = this.size, default: Int = -1): Int
fun IntArray.indexOf(v: Int, startOffset: Int = 0, endOffset: Int = this.size, default: Int = -1): Int
fun LongArray.indexOf(v: Long, startOffset: Int = 0, endOffset: Int = this.size, default: Int = -1): Int