Every time we publish a Linux hack that uses a shell script, someone will chime in about how awful it is to program shell scripts. While we like the ubiquity and efficiency, we can’t disagree… ...

I also don't understand why the script works without the 2 additional lines if I run it from the Script Editor or via osascript ????

We show you how to create and run PowerShell script file in Windows. You can create it using virtually any text editor or the ISE console.