Recursively enumerate nested groups in AD

GetNestedGroups.ps1

function getgroups ($object) {
### Example: getgroups -object somename.lastname | select name -unique
    Get-ADPrincipalGroupMembership $object | Foreach {
        $_
        Get-ADPrincipalGroupMembership $_
        }
}

function GetPortsandPrinters {
    $printers = Get-Printer
    foreach ($port in $(Get-PrinterPort)) {
        $printers | ? { $_.PortName -like $port.Name } | select Name, 
            @{Name = 'Port Name'; Expression = {$port.Name}}, 
            @{Name = 'Host Address'; Expression = {$port.PrinterHostAddress}}
    }
}