how to test the value returned by an array if it is empty?

[F]

Good evening. with this batch I have a problem testing the value returned by the "Wi-Fi network scan" block. If I choose to only scan WiFi in WEP for example, most of the time the array returned is empty. Well, that's what I thought because if I test the value by indicating "if null", the batch chooses "NO". Same thing if I say ="". And if I display the value between two characters (* for example) I have **.
What should we understand? how to test if the value returned by an array is empty or not? thank you again and have a good evening.

[Henrik "The Developer" Lindqvist]

In the Expression true block simply use nom, i.e. the array, since those evaluate to "false" when empty, see:

https://llamalab.com/automate/doc/expression.html#logical_operators

[F]

yesssss !!! thanks. it works.