Deleting items from a dynamic array of strings in Powershell

Note that PowerShell Uses .Net like code .

So declare the array as follow:

 $a = New-Object System.Collections.ArrayList

Now you can add items to this array:

 $a.Add("Server1")
 $a.Add("Server2")
 $a.Add("Server3")

If you print the array you get:

PS C:\Users\Work> $a
Server2
Server1
Server3

Now $a does have a Remove method:

 $a.Remove("Server2")

Now If you print the array you get:

   PS C:\Users\Work> $a
Server1
Server3

Either use an array list as Joe Tatavaran suggested (which is probably the most elegant solution), or re-assign the array like this:

$a = $a | ? { $_ -ne $server }

Can you load up the entire server list into an ArrayList? You could split it into arrays of five items, then work on each set of servers.

$servers = Get-Content serverlist.txt
$setIdx = -1
$sets = @()
for( $i = 0; $i -lt $servers.Count )
{
    if( $i % 5 -eq 0 )
    {
        $setIdx++
        $sets[$setIdx] = @()
    }
    $sets[$setIdx] += $servers[$idx]
}

foreach( $set in $sets )
{
    Restart-Computer $set[0]
    Restart-Computer $set[1]
    Restart-Computer $set[2]
    Restart-Computer $set[3]
    Restart-Computer $set[4]
}