If you don't mind using externals, you can use [iemguts/canvasargs] or [else/args]. I can't think of a way of doing this in Vanilla though. As you say, no argument seems to be indistinguishable from 0.

From: Pd-list <pd-list-bounces@lists.iem.at> on behalf of abel.jerome@free.fr <abel.jerome@free.fr>
Sent: 09 April 2018 13:02
To: pd-list@lists.iem.at
Subject: [PD] Test if an argument is void
 
Hi all,

Does anyone find a way to test if an argument is void into an abstraction ? The default behavior is to consider it as a float "0", but it would be very helpful to distinguish a "0" and no argument.

Thanks.

---
Jérôme
http://jeromeabel.net

_______________________________________________
Pd-list@lists.iem.at mailing list
UNSUBSCRIBE and account-management -> https://lists.puredata.info/listinfo/pd-list