How do I add a column of incrementing values to cmdlet output?

Question

Suppose I call `Get-Service` and want to assign a new column `ID` with the cmdlet output that prints incrementing integers so that: ``` ID Status Name DisplayName -- ------ ---- ----------- 0 Running AdobeARMservice Adobe Acrobat Update Service 1 Stopped AeLookupSvc Application Experience 2 Stopped ALG Application Layer Gateway Service ``` I'm trying to use `Select-Object` right now to add this column, but I don't quite understand how to iterate a variable in this sort of expression. Here's what I've got: ``` Get-Service | Select-Object @{ Name = "ID" ; Expression= { } }, Status, Name, DisplayName | Format-Table -Autosize ``` Is there a way to iterate integers within `Expression= { }`, or am I going about this problem the wrong way?

Accepted Answer

You can do it this way, though you will need to maintain some counter variable outside of the main expression.

```
$counter = 0
Get-Service |
Select-Object @{ Name = "ID" ; Expression= {$global:counter; $global:counter++} }, Status, Name, DisplayName |
Format-Table -Autosize
```

Another option, which is perhaps cleaner

```
Get-Service `
|% {$counter = -1} {$counter++; $_ | Add-Member -Name ID -Value $counter -MemberType NoteProperty -PassThru} `
| Format-Table ID
```

How do I add a column of incrementing values to cmdlet output?

Solution

Problem