NYC PowerShell User Group gist for giveaway lottery - nice for football pools too :P

randomwinners

$firstnumber = 0
$lastnumber = 9
$numberofwinners = 10

$numbers = new-object System.collections.arraylist
($firstnumber..$lastnumber) |%{ $numbers.add($_) |out-null}

function Get-NextNumber {
    param (
        [Parameter(Mandatory=$true, Position=0)]
        [System.collections.arraylist] $numbers
    )
    $number = $numbers |Get-Random
    $number
    $numbers.remove($number)
}

(1..$numberofwinners) |% {
    Get-NextNumber $numbers
}