Add Where-Object -Not support

I often have the need to filter for objects that do not have a property specified or who have a falsey value for a property by doing something like the following:

$Computers = [PSCustomObject]@{
    ComputerName = "SPC-1234"
    IPAddress = "192.168.0.1"
},
[PSCustomObject]@{
    ComputerName = "BGP-5678"
    IPAddress = ""
},
[PSCustomObject]@{
    ComputerName = "MGC-9101"
}

$Computers | 
Where {-not $_.IPAddress }

ComputerName IPAddress
------------ ---------
BGP-5678              
MGC-9101

If I am doing the opposite test I can avoid using a script block with Where-Object:

$Computers |
Where IPAddress

ComputerName IPAddress  
------------ ---------  
SPC-1234     192.168.0.1

I would like to be able to also avoid using a script block when using -Not which would enable the following:

$Computers | 
where -not IPAddress

This is an issue with the Where-Object cmdlet not the language itself.

Bruce Payette (@BrucePay)

Bruce Payette (@BrucePay) Thanks! Clear.
We have related Issue #2658 Do we want to really do this?

/cc Jason Shirk (@lzybkr)

I think I could add a -Not parameterset to Where-Object.

I can't find any tests for Where-Object, where are those?

I think it is a good idea.

Simon Wåhlin (@SimonWahlin)

Simon Wåhlin (@SimonWahlin) I dont found Where-Object test.
I think we should place it in test\powershell\Modules\Microsoft.PowerShell.Core folder.

Thanks, I'll try to come up with a set of tests and place them there.

Simon Wåhlin (@SimonWahlin)

Simon Wåhlin (@SimonWahlin) Please use new Pester 4 syntax in tests.

Absolutely!

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Add Where-Object -Not support #3529

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Add Where-Object -Not support #3529

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BrucePay commented on Apr 11, 2017

iSazonov commented on Apr 12, 2017

SimonWahlin commented on Mar 8, 2018

powercode commented on Mar 8, 2018

iSazonov commented on Mar 12, 2018

SimonWahlin commented on Mar 12, 2018

iSazonov commented on Mar 12, 2018

SimonWahlin commented on Mar 12, 2018

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