On Mon, 23 Jul 2007, B. Bogart wrote:
So I've been doing lots of calculations with expr and creation arguments, and it seems to send an int when it should send a float way too often: [expr 8 / 20] returns 0!!! Have I lost my mind? Is my machine going crazy? or is expr actually doing what I see here?
expr supports the int type because [expr] comes from jMax/FTS/Max/etc. So if you put a number without a dot it's parsed as an int. Then the main difference between ints and floats is that an int divided by an int is rounded towards zero (many languages do it like that but some others round it always downwards instead; some others instead force the result to be a float or a rational)
What you can do is either [expr 8 / 20.0] or [expr 8.0 / 20] or obviously [expr 8.0 / 20.0]
You only need to make one of the two as float because float has priority on int, so when a float comes into contact with an int, the int is converted, even though float can't represent everything that int can, e.g. compare
[expr 123456789%10] finds last digit of 123456789 [expr int(123456789.0)%10] fails because float isn't that precisedo not put a space before % in that first example! if you do, pd will parse it as a number, turn it to float, then give it to [expr], which determines that float % int = syntax error.
cool, eh? _ _ __ ___ _____ ________ _____________ _____________________ ... | Mathieu Bouchard - tél:+1.514.383.3801, Montréal QC Canada
_______________________________________________ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
