PowerShell完全复制数组

Question

我正在尝试创建现有数组的完整副本.每次我尝试这个似乎都不起作用.问题是我正在修改新复制数组中的Object名称,但它们也在原始数组中进行了更改.

下面的代码是高度简化的,因为有更多的事情发生,然后只重命名对象名称,但它证明了我认为的重点.

一些示例代码:

Function Get-Fruits {
    Param (
        $Fruits = @('Banana', 'Apple', 'Pear')
    )
    foreach ($F in $Fruits) {
        [PSCustomObject]@{
            Type = $F
        }
    }
}

$FruitsOriginal = Get-Fruits

Function Rename-ObjectName {
    # Copy the array here
    $FruitsNew = $FruitsOriginal # Not a true copy
    $FruitsNew = $FruitsOriginal | % {$_} # Not a true copy
    $FruitsNew = $FruitsOriginal.Clone() # Not a true copy

    $FruitsNew | Get-Member | ? MemberType -EQ NoteProperty | % {

        $Name = $_.Name

        $FruitsNew | % {
            $_ | Add-Member 'Tasty fruits' -NotePropertyValue $_.$Name
            $_.PSObject.Properties.Remove($Name)
        }
    }
}

Rename-ObjectName

期望的结果是2个完全独立的阵列.

$ FruitsOriginal

Type
----
Banana
Apple
Pear

$ FruitsNew

Tasty fruits
------------
Banana
Apple
Pear

谢谢您的帮助.

Answer 1

您可以使用序列化来深度克隆阵列:

#Original data
$FruitsOriginal = Get-Fruits

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

#Deep copied data
$FruitsNew = $bf.Deserialize($ms)
$ms.Close()

Answer 2

# Copy the array here
$FruitsCopy = @()
$FruitsCopy = $FruitsCopy + $FruitsOriginal

Answer 3

从 Powershell 3.0 开始，方法与Jaco 的答案相同，但使用 PSSerializer。
它使用CliXML与Export-Clixml&兼容的格式，Import-Clixml我个人觉得它更容易阅读。
理论上，支持嵌套层次结构到[int32]::MaxValue级别-深

#   Original data
$FruitsOriginal     =    Get-Fruits
#   Serialize and Deserialize data using PSSerializer:
$_TempCliXMLString  =   [System.Management.Automation.PSSerializer]::Serialize($FruitsOriginal, [int32]::MaxValue)
$FruitsNew          =   [System.Management.Automation.PSSerializer]::Deserialize($_TempCliXMLString)
#   Deep copy done.