深度复制PSObject [英] Deep copying a PSObject

问题描述

我有一个Powershell脚本，在其中执行以下操作

I have a powershell script in which I do the following

$somePSObjectHashtables = New-Object Hashtable[] $somePSObject.Length;
$somePSObjects = Import-CSV $csvPath
0..($somePSObject.Length - 1) | ForEach-Object {
    $i = $_;
    $somePSObjectHashtables[$i] = @{};
    $somePSObject[$_].PSObject.Properties | ForEach-Object {
        $somePSObjectHashtables[$i][$_.Name] = $_.Value;
    }
}

我需要这样做，因为我想做几个CSV中数据的不同副本，以执行几种不同的操作。从某种意义上说，我在 PSObject 。我可以使用$ somePSObjectHashtables 进行迭代。 nofollow> ForEach对象，然后调用哈希表.Clone（）在数组的每个成员上。然后，我可以使用 New-Object PSObject -Property $ someHashTable [$ i] 来获取PSObject的深层副本。

I need to do this because I want to make several distinct copies of the data in the CSV to perform several distinct manipulations. In a sense I'm performing an "INNER JOIN" on the resulting array of PSObject. I can easily iterate through $somePSObjectHashtables with a ForEach-Object and call Hashtable.Clone() on each member of the array. I can then use New-Object PSObject -Property $someHashTable[$i] to get a deep copy of the PSObject.

我的问题是，在没有中间哈希表的情况下，是否有一些更简单的方法来制作深层副本？

My question is, is there some easier way of making the deep copy, without an intermediary Hashtable?

推荐答案

非常深的副本，我们可以使用二进制序列化（假设所有数据都是可序列化的；对于来自CSV的数据，绝对是这种情况）：

For getting really deep copies we can use binary serialization (assuming that all data are serializable; this is definitely the case for data that come from CSV):

# Get original data
$data = Import-Csv ...

# Serialize and Deserialize data using BinaryFormatter
$ms = New-Object System.IO.MemoryStream
$bf = New-Object System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
$bf.Serialize($ms, $data)
$ms.Position = 0
$data2 = $bf.Deserialize($ms)
$ms.Close()

# Use deep copied data
$data2

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