Get-Pingables

Function Get-Pingables {
    [cmdletbinding()]
    Param(
        [parameter(Mandatory=$True, ValueFromPipeline = $True, Position = 0)]
            [String[]]$ComputerName,
            [switch]$Online
    )

    $pingable = [System.Collections.Generic.List[PSObject]]::new()
    $ComputerName | ForEach-Object {
        Set-Variable -Name "Status_$_" -Value (Test-Connection -ComputerName $_ -AsJob -Count 1)
    }

    Get-Variable "Status_*" -ValueOnly | ForEach-Object {
        $Status = Wait-Job $_ | Receive-Job
        $reachable = $False
        $addr = ""

        if ($Status.ResponseTime -ne $null ) {
            $addr = $Status.Address
            $reachable = $True
        }

        $pingable.add([PSCustomObject]@{'Computer' = $Status.Address; 'Online' = $reachable})
    }
    if ($Online) {
        Return $pingable | Where-Object { $_.Online } | Select-Object Computer
    } else {
        Return $pingable | Sort-Object -Descending -Property 'Online'
    }
}