Prefix a string for each array values in Powershell

Question

I have a list of users that I need to grant access to a set of Windows services. It works well for a defined set of users, but I want to make the script more dynamic and pass the user and group names dynamically. I can do foreach, but I want to be able to prefix domain name at the beginning for each users. Example:

$usrs = "abc", "def", "ghi", "jkl"

When I do foreach ($usr in $usrs) it needs to prefix "abc" with "AU\abc" and so on.

Answer 1

One way to do it:

$usrs = "abc", "def", "ghi", "jkl" | % { "AU\"+$_ }

Answer 2

This should help.

$usrs = "abc", "def", "ghi", "jkl"
foreach ($user in $usrs) {
    "AU\${user}"
}

Also, starting PowerShell 4.0, you can do this as well.

$usrs = "abc", "def", "ghi", "jkl"
$usrs.ForEach({"AU\$_"})