基于唯一属性将数组拆分为独立对象的技术咨询

Based on your sample DSC configuration results, here's a practical way to split your array into separate logical groups/objects using a unique property:

Step 1: Assume your array is stored in a variable #

First, let’s say your existing array is saved in $dscResults (swap this with your actual variable name):

# Example matching your sample data
$dscResults = @(
    [PSCustomObject]@{
        PSComputerName = "server1.domain.local"
        ResourceName = "WindowsFeature"
        InstanceName = "Backup"
        InDesiredState = $true
        ConfigurationName = "BaseConfig"
        StartDate = [DateTime]"24/04/2018 14:31:23"
    },
    [PSCustomObject]@{
        PSComputerName = "server1.domain.local"
        ResourceName = "Registry"
        InstanceName = "fDenyTSConnections"
        InDesiredState = $true
        ConfigurationName = "BaseConfig"
        StartDate = [DateTime]"24/04/2018 14:31:23"
    },
    [PSCustomObject]@{
        PSComputerName = "server1.domain.local"
        ResourceName = "Registry"
        InstanceName = "UserAuthentication"
        InDesiredState = $true
        ConfigurationName = "BaseConfig"
        StartDate = [DateTime]"24/04/2018 14:31:23"
    }
)

Step 2: Group the array by your target unique property #

Use Group-Object to cluster items by the property you want to split on. For example, splitting by ResourceName:

$groupedResults = $dscResults | Group-Object -Property ResourceName

Step 3: Extract independent collections #

Each group in $groupedResults contains all items matching that unique property value. You can pull them into separate variables for easy use:

# Isolate all WindowsFeature entries
$windowsFeatureSet = $groupedResults | Where-Object Name -eq "WindowsFeature" | Select-Object -ExpandProperty Group

# Isolate all Registry entries
$registrySet = $groupedResults | Where-Object Name -eq "Registry" | Select-Object -ExpandProperty Group

Alternative: Use a hashtable for quick lookup #

If you want instant access to any group by its property value, convert the grouped results into a hashtable:

$splitLookup = @{}
$dscResults | Group-Object -Property ResourceName | ForEach-Object {
    $splitLookup[$_.Name] = $_.Group
}

# Access groups directly by property value
$splitLookup["WindowsFeature"] # Returns all WindowsFeature items
$splitLookup["Registry"] # Returns all Registry items

Key Notes #

• Replace ResourceName with whatever unique property you need (e.g., InstanceName if each instance is distinct).
• If you need individual items as standalone objects instead of grouped sets, you can iterate over the original array directly, but grouping is far more efficient for logical splits.

内容的提问来源于stack exchange，提问作者PnP