小编Vai*_*hav的帖子

我有以下数据类

data class PuzzleBoard(val board: IntArray) {
    val dimension by lazy { Math.sqrt(board.size.toDouble()).toInt() }
}

我读到Kotlin中的数据类可以免费获得equals()/ hashcode()方法.

我实例化了两个对象.

val board1 = PuzzleBoard(intArrayOf(1,2,3,4,5,6,7,8,0))
val board2 = PuzzleBoard(intArrayOf(1,2,3,4,5,6,7,8,0))

但是仍然以下语句返回false.

board1 == board2
board1.equals(board2)