Powershell empty/duplicate finder/remover

delete_dups.ps

ls *.* -recurse | get-filehash | group -property hash | where { $_.count -gt 1 } | % { $_.group | select -skip 1 } | del

# https://n3wjack.net/2015/04/06/find-and-delete-duplicate-files-with-just-powershell/

delete_empty.ps

$tdc="C:\a\c\d"
do {
  $dirs = gci $tdc -directory -recurse | Where { (gci $_.fullName -Force).count -eq 0 } | select -expandproperty FullName
  $dirs | Foreach-Object { Remove-Item $_ }
} while ($dirs.count -gt 0)

# https://stackoverflow.com/questions/28631419/how-to-recursively-remove-all-empty-folders-in-powershell