How to reverse the properties of pscustomobject? - arrays

Question

Is it possible to reverse the properties of [Pscustomobject] ?
I have to setup resources in queue order. After testing is over , i have to teardown the resources in reverse order.
below is the sample code.
$volume= #{Name='Vol1';size = "100gb"}
$VolumeCollection = #{Name = 'VolColl'; Volume = $volume}
$ResourceQueue = [pscustomobject]#{
Volume = $Volume
VolumeCollection = $VolumeCollection
}
function SEtup-Resources
{
param
(
[psobject]$resource
)
$resource.PSObject.Properties | foreach-object {
switch ($_.name) {
"volume" {
"Volume is created"
}
"VolumeCollection" {
"volcoll is created"
}
}
}
}
function TearDown-Resources
{
param
(
[psobject]$resource
)
# I have to reverse the object properties
$resource.PSObject.Properties | foreach-object {
switch ($_.name) {
"volume" {
"Volume is deleted"
}
"VolumeCollection" {
"volcoll is deleted"
}
}
}
}
Write-host "-------------------------"
Write-host "Setup resources"
Write-host "-------------------------"
SEtup-Resources -resource $ResourceQueue
Write-host "-------------------------"
Write-host "teardown resources"
Write-host "-------------------------"
TearDown-Resources -resource $ResourceQueue
The result should be
-------------------------
Setup resources
-------------------------
Volume is created
volcoll is created
-------------------------
teardown resources
-------------------------
volcoll is deleted
volume is deleted
But i could not find the way to reverse the properties of an object. How to reverse the pscustomobject properties in powershell?

Answer 1

If you only need to alter order of few properties, you could just list them manually to Select-Object:
$ResourceQueue | Select-Object VolumeCollection, Volume
For more generic solution one could use Get-Memberto get an array of properties, use [Array]::reverse to reverse
order and then Select-Object to get the properties in desired order. I came out with this:
$props = #()
$MyObject | Get-Member | ForEach-Object { $props += $_.name }
[Array]::Reverse($props)
$MyObject | Select-Object $props

Answer 2

You can do it this way:
$object = '' | select PropertyA, PropertyB, PropertyC
$object.PropertyA = 1234
$object.PropertyB = 'abcd'
$object.PropertyC = 'xyz'
$properties = ($object | Get-Member -MemberType NoteProperty).Name
[Array]::Reverse($properties)
$object | select $properties
The result is
PropertyC PropertyB PropertyA
--------- --------- ---------
xyz abcd 1234