How to use Powershell Where-Object like an IN statement

Question

I have the following code which works:

foreach ($db in $svr.Databases | 
         where-object {
         $_.name -eq "testDB" 
         -or $_.name -eq "master"
         -or $_.name -eq "model"
         -or $_.name -eq "msdb" } )
{
  write-output $db.name
}

Is a cleaner way to do this?

Something like:

foreach ($db in $svr.Databases | 
         where-object {$_.name -in "testDB, master, model, msdb" } )    
{
  write-output $db.name
}

Answer 1

Use the -contains operator. Like:

$dbs = "testDB", "master", "model", "msdb"

foreach ($db in ($svr.Databases | where-object {$dbs -contains $_.name  } )) {
    write-output $db.name
}

Use help about_Comparison_Operators to learn more about this and other comparison operators.

Update:

PowerShell v3 has added the -in operator. The example in the original question will work in v3.