powershell - 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 answer keeps going through all the letters even if it has already found a free drive letter.

Answer 1

At PowerShell Magazine, we ran a brain teaser contest to find out the shortest answer to your question. Check this:

http://www.powershellmagazine.com/2012/01/12/find-an-unused-drive-letter/

There are several answers but here is my fav one:

ls function:[d-z]: -n | ?{ !(test-path $_) } | random