Today I ran into the scenario where I want to use bash/zsh to remove the file extension from a string. I wanted to read in the filename, then create a directory based on the filename. If you copy/paste the following into your terminal, you should see it work.
Or if you’re using it inside of a zsh function and passing in a parameter:
Whereas you would usually use
$1 to read the parameter, this time we’re using
the substituation syntax to both read and remove the
. and everything after.