How can I put objects from a Get- command in a list/array? - powershell

Question

I just started a new internship and right now I'm working with Powershell to get the hang of it.
My exercise right now is to write a script that will select 50 random computers from the DNS record and delete the name and the associated IP or the record.
My issue is that I don't know how to add the list of DNS records to an array list where I can delete them by the index value. I've tried various methods but with no avail.
This is what I have so far:
#this is getting all the objects that i need from the DNS record, its a test environment
$ListDNS = Get-DnsServerResourceRecord -ComputerName "win-309382aqq99" -ZoneName 'www.abc.com' -RRType A | Where-Object {$_.HostName -like "ABC-PC-*"} | FT Hostname
$testArray = #()
Function addToArray($ListDNS)
{
$testArray += $ListaDNS
}
$counter_elements = 0
Foreach( $var in $ListDNS) {
$counter_elements++
}
$counter_delete = 0
while($counter_delete -ne 50) {
$random_number = get-random -Maximum $counter_elements -Minimum 0
$testArray.RemoveAt($random_number)
$counter_elements--
$counter_delete++
}
I'm pretty sure the first array is not working. I'm aware this is probably too over-engineered and powershell has better commands I could use but I'm working with what I can right now.

Answer 1

If you wrap the Get-DnsServerResourceRecord ... pipeline in the array subexpression operator - #() - the result will always be an array type:
$records = #(Get-DnsServerResourceRecord -ComputerName "win-309382aqq99" -ZoneName 'www.abc.com' -RRType A | Where-Object {$_.HostName -like "ABC-PC-*"})
# We can count the records
$records.Count
# We can address the individual records by index
$records[0]
To pick 50 records at random, simply pipe the whole array to Get-Random -Count 50:
$recordsToDelete = $records |Get-Random -Count 50
foreach($item in $recordsToDelete){
# perform deletion here
}