PowerShell Where-Object-如何对条件进行分组

Question

I have a PowerShell script with a variable that is piped into "where-object". This where clause contains multiple statements that have to be true (-AND) and two statements, where at least one has to be true (-XOR). How do I group them? Nothing I've tried worked so far:

$var | Where-Object { condition1 -AND condition2 -AND condition3 -XOR condition4 }
$var | Where-Object { condition1 -AND condition2 -AND (condition3 -XOR  condition4) }    
$var | Where-Object { (condition1 -AND condition2) -AND condition3 -XOR  condition4 }
$var | Where-Object { (condition1 -AND condition2) -AND (condition3 -XOR condition4) }

Can you help me?

Thanks in advance!

Answer 1

Did you tried this one :

$var | Where-Object { condition1 -AND condition2 -AND (condition3 -OR  condition4) } 

As a side reminder, here's the Microsoft official man page that can interest you :

    -or       Logical or. TRUE when either     (1 -eq 1) -or (1 -eq 2) 
              or both statements are TRUE.     True


    -xor      Logical exclusive or. TRUE       (1 -eq 1) -xor (2 -eq 2)
              only when one of the statements  False 
              is TRUE and the other is FALSE.

And since I'm here, another tought : Depending on the size and structure of your $var object, checking ALL conditions on ALL Objects can take some time, you should filter it :

Reminder : ? is a natural alias to Where-Object :

$var | ? { condition1 } |? { condition2 } |? { condition3 -OR  condition4 } 

This might help your script to go faster ...

Answer 2

Thank you for all the suggestions and possibilities to check the outcome of the conditions. In the end I've used a slightly different solution:

if ( $var | Where-Object { condition1 -AND condition2 -AND condition3 } ) {
    Write-Host "Do some stuff"
    }
else {
    if ( $var | Where-Object { condition1 -AND condition2 -AND condition4 } ) {
        Write-Host "Do other stuff"
        }
    }