PowerShell count issue

Here's an enquiry to see if a service exists:

PS U:\> (get-process | where-object {$_.Name -eq "SERVICE1"})

Handles NPM(K) PM(K) WS(K) VM(M) CPU(s) Id ProcessName
------- ------ ----- ----- ----- ------ -- -----------
234 9 15856 22628 119 197.64 6016 SERVICE1

....and another one...

PS U:\> (get-process | where-object {$_.Name -eq "SERVICE2"})

Handles NPM(K) PM(K) WS(K) VM(M) CPU(s) Id ProcessName
------- ------ ----- ----- ----- ------ -- -----------
167 9 36300 44920 169 8,886.28 424 SERVICE2
167 9 36880 45504 167 8,936.44 652 SERVICE2
167 9 23376 32200 154 ...78.23 2640 SERVICE2
167 9 18820 27428 151 ...19.47 4500 SERVICE2
167 9 34476 43316 165 ...90.56 4856 SERVICE2
167 9 21428 30092 348 7,172.11 5308 SERVICE2

Perfect: that's correct, and what I need to know, so let's try just getting a count back:

PS U:\> (get-process | where-object {$_.Name -eq "SERVICE1"}).count
PS U:\> (get-process | where-object {$_.Name -eq "SERVICE2"}).count
6

Can anybody tell me why the SERVICE1 count returns nothing?

Out of interest, I also tried this:
PS U:\> (get-process | where-object {$_.Name -eq "SERVICE1"}).count+1-1
0
PS U:\> (get-process | where-object {$_.Name -eq "SERVICE2"}).count+1-1
6

One one of my servers, process 'sqlservr' occurs twice, and that correctly returns a count of 2: it just seems to be an issue when the count is 1.

Any thoughts?

Jay

When there's only one item to return PowerShell treats it as a scalar vs.
multiple
items that returns (generally) as an array (Thanks Kiron).

If you need to check for the length or the count property try to cast it
into an Array


Try this:

@(get-process | where-object {$_.Name -eq "SERVICE1"}).count



Shay
http://scriptolog.blogspot.com



> Here's an enquiry to see if a service exists:
>
> PS U:\> (get-process | where-object {$_.Name -eq "SERVICE1"})
>
> Handles NPM(K) PM(K) WS(K) VM(M) CPU(s) Id ProcessName
> ------- ------ ----- ----- ----- ------ -- -----------
> 234 9 15856 22628 119 197.64 6016 SERVICE1
> ...and another one...
>
> PS U:\> (get-process | where-object {$_.Name -eq "SERVICE2"})
>
> Handles NPM(K) PM(K) WS(K) VM(M) CPU(s) Id ProcessName
> ------- ------ ----- ----- ----- ------ -- -----------
> 167 9 36300 44920 169 8,886.28 424 SERVICE2
> 167 9 36880 45504 167 8,936.44 652 SERVICE2
> 167 9 23376 32200 154 ...78.23 2640 SERVICE2
> 167 9 18820 27428 151 ...19.47 4500 SERVICE2
> 167 9 34476 43316 165 ...90.56 4856 SERVICE2
> 167 9 21428 30092 348 7,172.11 5308 SERVICE2
> Perfect: that's correct, and what I need to know, so let's try just
> getting a count back:
>
> PS U:\> (get-process | where-object {$_.Name -eq "SERVICE1"}).count PS
> U:\> (get-process | where-object {$_.Name -eq "SERVICE2"}).count 6
>
> Can anybody tell me why the SERVICE1 count returns nothing?
>
> Out of interest, I also tried this:
> PS U:\> (get-process | where-object {$_.Name -eq
> "SERVICE1"}).count+1-1
> 0
> PS U:\> (get-process | where-object {$_.Name -eq
> "SERVICE2"}).count+1-1
> 6
> One one of my servers, process 'sqlservr' occurs twice, and that
> correctly returns a count of 2: it just seems to be an issue when the
> count is 1.
>
> Any thoughts?
>
> Jay
>

Shay - that's the answer - since posting the message I'd found what the
problem was but was bumbling around trying (and failing) to find an
solution, so many thanks!

Jay


"Shay Levi" <no@addre.ss> wrote in message
news:8766a9443a398c9a65eb15a3ab8@news.microsoft.com...
> When there's only one item to return PowerShell treats it as a scalar vs.
> multiple
> items that returns (generally) as an array (Thanks Kiron).
>
> If you need to check for the length or the count property try to cast it
> into an Array
>
>
> Try this:
>
> @(get-process | where-object {$_.Name -eq "SERVICE1"}).count
>
>
>
> Shay
> http://scriptolog.blogspot.com
>
>
>
>> Here's an enquiry to see if a service exists:
>>
>> PS U:\> (get-process | where-object {$_.Name -eq "SERVICE1"})
>>
>> Handles NPM(K) PM(K) WS(K) VM(M) CPU(s) Id ProcessName
>> ------- ------ ----- ----- ----- ------ -- -----------
>> 234 9 15856 22628 119 197.64 6016 SERVICE1
>> ...and another one...
>>
>> PS U:\> (get-process | where-object {$_.Name -eq "SERVICE2"})
>>
>> Handles NPM(K) PM(K) WS(K) VM(M) CPU(s) Id ProcessName
>> ------- ------ ----- ----- ----- ------ -- -----------
>> 167 9 36300 44920 169 8,886.28 424 SERVICE2
>> 167 9 36880 45504 167 8,936.44 652 SERVICE2
>> 167 9 23376 32200 154 ...78.23 2640 SERVICE2
>> 167 9 18820 27428 151 ...19.47 4500 SERVICE2
>> 167 9 34476 43316 165 ...90.56 4856 SERVICE2
>> 167 9 21428 30092 348 7,172.11 5308 SERVICE2
>> Perfect: that's correct, and what I need to know, so let's try just
>> getting a count back:
>>
>> PS U:\> (get-process | where-object {$_.Name -eq "SERVICE1"}).count PS
>> U:\> (get-process | where-object {$_.Name -eq "SERVICE2"}).count 6
>>
>> Can anybody tell me why the SERVICE1 count returns nothing?
>>
>> Out of interest, I also tried this:
>> PS U:\> (get-process | where-object {$_.Name -eq
>> "SERVICE1"}).count+1-1
>> 0
>> PS U:\> (get-process | where-object {$_.Name -eq
>> "SERVICE2"}).count+1-1
>> 6
>> One one of my servers, process 'sqlservr' occurs twice, and that
>> correctly returns a count of 2: it just seems to be an issue when the
>> count is 1.
>>
>> Any thoughts?
>>
>> Jay
>>
>
>

You could use the following to get a result even when there is just
one process matching your "where-object".

([Object[]](Get-Process | ?{$_.Name -eq "explorer"})).Count

MS