列表匹配

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calendarEvent?.userList?.let { list ->
    // 先转成map，时间复杂度从 O(n×m) 降到 O(n + m)，性能更好
    val relatedUserMap = users.associateBy { it.uid }
    mAdapter.setNewInstance(list.mapNotNull { relatedUserMap[it.uid] }.toMutableList())
}