Dave Mason continues a quest into the bowels of Powershell:
Let’s talk a little bit about PowerShell variables and how long they exist within the scopes they’re defined. I’ve encountered some behavior that for me, was unexpected. It’s made my development efforts unproductive–especially when it comes to debugging.
Just like with notebooks, it’s important to remember that the Powershell prompt has a session, and that you aren’t running fresh every time. You can also use Dave’s solution to the problem, which makes sense as well.