Using two Where commands to run two checks - where-clause

Question

I am using this command
Where {$_.Extension -match "zip||rar"}
but need to use this command too
Where {$_.FullName -notlike $IgnoreDirectories}
Should I use a && or II as in
Where {$_.Extension -match "zip||rar"} && Where {$_.FullName -notlike $IgnoreDirectories}
or
Where {$_.Extension -match "zip||rar"} || Where {$_.FullName -notlike $IgnoreDirectories}
?
What I am trying to accomplish is to have every zip and rar file be extracted but I want to skip the extraction of the zip or rar files in some of my directories. What is the best solution for this?

Answer 1

When in doubt, read the documentation.
Windows PowerShell supports the following logical operators.
-and Logical and. TRUE only when both statements are TRUE.
-or Logical or. TRUE when either or both statements are TRUE.
-xor Logical exclusive or. TRUE only when one of the statements is TRUE and the other is FALSE.
-not Logical not. Negates the statement that follows it.
! Logical not. Negates the statement that follows it. (Same as -not)
Put both clauses in the same scriptblock and connect them with the appropriate logical operator. For a logical AND between the two clauses use -and:
Where-Object {
$_.Extension -match "zip||rar" -and
$_.FullName -notlike $IgnoreDirectories
}
For a logical OR between the two clauses use -or:
Where-Object {
$_.Extension -match "zip||rar" -or
$_.FullName -notlike $IgnoreDirectories
}
In your case it's probably the former.
Note that your regular expression zip||rar matches any extension due to the empty string between the two |. To match only items with the extension .rar or .zip remove one pipe: $_.Extension -match "zip|rar".