Filtering an array based on hash table contents

[TheVMinator]

I have a report that uses two arrays and a hashtable.

1. $report = An array containing a group of VMs and custom properties for those VMs.  The virtual machine names are in a property called VMName

2.  $removedvms = An array containing a list of virtual machine names.  The virtual machine names are also in a property called VMName

3. $vmhash = A hash table

For every virtual machine object that is present in the $report array and also has its name listed in the $removedvms array, I would like to remove the object from the $report array.  Using the code below, the hash table now has only the names of the VMs that are in $report but are NOT in $removedvms. 

How do I remove the objects from $report that are NOT in $vmhash?

$vmhash=@{}

$report | %{$vmhash.Add($_.VMName,$_)}

$removedvms | %{

if($vmhash.ContainsKey($_.Name)){

$vmhash.Remove($_.Name)

}

}

[RvdNieuwendijk]

You can remove the objects from $report that are not in $vmhash with:

$report = $report | Where-Object {-not $vmhash[$_.VMName]}

You don't have to use the hashtable, if you just create a list of the names of the removed vm's. For example:

$RemovedVMNames = $removedvms | Select-Object -ExpandProperty VMName

$report = $report | Where-Object {$RemovedVMNames -notcontains $_.VMName}

[LucD]

Try with

$report = $report | where {!$vmhash.Contains($_.VMName)}