[Kotlin][Array] copyOfRange

원래 배열의 지정된 범위의 복사본인 새 배열을 반환합니다.

public actual inline fun <T> Array<T>.copyOfRange(fromIndex: Int, toIndex: Int): Array<T> {
    return if (kotlin.internal.apiVersionIsAtLeast(1, 3, 0)) {
        copyOfRangeImpl(fromIndex, toIndex)
    } else {
        if (toIndex > size) throw IndexOutOfBoundsException("toIndex: $toIndex, size: $size")
        java.util.Arrays.copyOfRange(this, fromIndex, toIndex)
    }
}


val arr = arrayOf(1, 2, 3, 4, 5)
print(arr.copyOfRange(2, 4).joinToString()) // 3, 4

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copyOfRange - Kotlin Programming Language