When is -gt 0 NOT -ne $null ?

[Jeff Taylor Participant Topics: 125 Replies: 270 Points: 316Rank: Contributor]

I ran some code yesterday that used this filter:

PowerShell

Where-Object { $_.delivContLength -ne $null -or $_.submissionContLength -ne $null }

1	Where-Object { $_.delivContLength -ne $null -or $_.submissionContLength -ne $null }

…yet, when I ran today a different filter:

PowerShell

-Filter {(delivContlength -gt 0)-or(submissionContLength -gt 0)}

1	-Filter {(delivContlength -gt 0)-or(submissionContLength -gt 0)}

..it discovered some (much greater than 0) values.

How should these strings be best Filtered for?

[kvprasoon Senior Moderator Topics: 9 Replies: 1311 Points: 4,794Rank: Community Hero]

0 and $null are not same, can you give lil more detail on against what cmdlet output you ran these fiilters and the difference in output in both.

[Jeff Taylor Participant Topics: 125 Replies: 270 Points: 316Rank: Contributor]

Sure, I was using Get-ADUser to search for values in the aforementioned attributes

[kvprasoon Senior Moderator Topics: 9 Replies: 1311 Points: 4,794Rank: Community Hero]

AFAIK both filter works differently here, Where-Objects takes the object once Get-ADUser executes per user where as the built-in Filter does it internally then give the output. What is the difference in output with both the approaches.

[Jeff Taylor Participant Topics: 125 Replies: 270 Points: 316Rank: Contributor]

It may be new values were added since last night by some other process but I cleared out those two attributes for all users that had them (via -ne $NULL discovery) and then today was alerted by a different Filter that there were others (although not near as many).

I’ll check Monday using both filters and see what’s up in the environment.

[Jeff Taylor Participant Topics: 125 Replies: 270 Points: 316Rank: Contributor]

I have another Domain to test these 2 filters. Methinks there is a process populating the 2 attributes.

PowerShell

PS C:\> ($UserREQ1).Count 12 PS C:\> ($UserREQ1_filter2).Count 12

1 2 3 4 5

PS C:\> ($UserREQ1).Count 12   PS C:\> ($UserREQ1_filter2).Count 12

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