Using regex to parse & tokenise strings in one operation

## Original code from https://devblogs.microsoft.com/scripting/testing-rpc-ports-with-powershell-and-yes-its-as-much-fun-as-it-sounds/
## Showing here how to use regular expressions (regex) to match and tokenise strings in one operation via the $Matches built in variable
ForEach ($strResult in $arrQuryResult)
{
    ## ncacn_ip_tcp:grl-dc03[49668]
    If ($strResult -match "ip_tcp.*\[(\d+)\]" )
    {
        ## += on arrays/strings can be very slow! Use System.Collections.Generic.List & StringBuilder respectively
        ## the () in the regex above denote a matching group where the first will go into $Matches[1] which is a built in hash table containing the matched groups
        $arrPorts += $Matches[1]
    }
}