Getting a free drive letter

Question

I saw the Get-NextFreeDrive function in this answer and I wondered if there was a more efficient way to do this. It appears that the function in the linked answ

Answer 1

$taken = Get-WmiObject Win32_LogicalDisk | Select -expand DeviceID
$letter = 65..90 | ForEach-Object{ [char]$_ + ":" }
(Compare-Object -ReferenceObject $letter -DifferenceObject $taken)[1].InputObject

Just for fun to shave an extra line of code (lol). If you wanted to be cloppy as heck you could skip instantiating variables and just pipe those directly into -Ref and -Diff directly, probably ought to be slapped for doing that though. :)

Selects [1] to avoid getting the A: drive just in case that might complicate matters.