Appending suffix to an array list in PowerShell [duplicate]

Question

I have an array list of hostnames that I need to do two things with. The first is to take the list of server names and make them lowercase. The second thing I need to do is append a domain suffix. I've gotten the array list created and made the list lowercase, but I'm having issues appending the domain suffix. Example of what I have: HOST1 HOST2 HOST3

$Stringarray = [System.Collections.ArrayList]@(“HOST1" ,"HOST2" , "HOST3", "HOST4")
$Stringarray.tolower()
$Stringarray 

I can create an arraylist and then use .tolower() to get it lowercase, but I need each of the items in the list to include a domain name as well. For Example:

host1.contoso.com 
host2.contoso.com
host3.contoso.com
host4.contoso.com
etc.

I think a foreach command would work, I'm just not sure how to pass the argument.

Answer 1

Unless you have a specific need to use an ArrayList, you can simply construct your Array in one go using a loop of your choice, ForEach-Object in the example below.

You can use the + arithmetic operator to concatenate strings.

$domain = 'contoso.com'
$Stringarray = "HOST1" ,"HOST2" , "HOST3", "HOST4" | ForEach-Object {
    $_.ToLower() + ".$domain"
}

# $Stringarray is now the expected result:
#
# host1.contoso.com
# host2.contoso.com
# host3.contoso.com
# host4.contoso.com

Answer 2

Try to do this :

$Stringarray = [System.Collections.ArrayList]@(“HOST1" ,"HOST2" , "HOST3", "HOST4")
$Stringarray | % { "$($_.tolower()).contoso.com"   }