Fast filename replace

This is a short article for a short PowerShell command.

Have you ever had a folder filled with files wheree you wanted to replace all spaces in the file names with dashes for example? If yes, then this script will work wonders for you.

get-childitem *.mp3 | foreach { rename-item $_ $_.Name.Replace(" ", "_") }

That command replaces all spaces with underscores in all mp3 files in the folder it's run. The syntax is pretty explicit, get-childitem tells powershell to get all the contents of the folder with the extension specified (in our case it's *.mp3) and makes a loop over all elements (foreach) where it replaces all spaces with underscores for each item found with that extension.