PowerShell Working with Objects Updating Objects
Example
Adding properties
If you'd like to add properties to an existing object, you can use the Add-Member cmdlet. With PSObjects, values are kept in a type of "Note Properties"
$object = New-Object -TypeName PSObject -Property @{
Name = $env:username
ID = 12
Address = $null
}
Add-Member -InputObject $object -Name "SomeNewProp" -Value "A value" -MemberType NoteProperty
# Returns
PS> $Object
Name ID Address SomeNewProp
---- -- ------- -----------
nem 12 A value
You can also add properties with Select-Object Cmdlet (so called calculated properties):
$newObject = $Object | Select-Object *, @{label='SomeOtherProp'; expression={'Another value'}}
# Returns
PS> $newObject
Name ID Address SomeNewProp SomeOtherProp
---- -- ------- ----------- -------------
nem 12 A value Another value
The command above can be shortened to this:
$newObject = $Object | Select *,@{l='SomeOtherProp';e={'Another value'}}
Removing properties
You can use the Select-Object Cmdlet to remove properties from an object:
$object = $newObject | Select-Object * -ExcludeProperty ID, Address
# Returns
PS> $object
Name SomeNewProp SomeOtherProp
---- ----------- -------------
nem A value Another value
