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 Forum index » DIY Hardware and Software » ChucK programming language
float x --> not a number?
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kijjaz



Joined: Sep 20, 2004
Posts: 765
Location: bangkok, thailand
Audio files: 4

PostPosted: Wed Nov 15, 2006 10:49 am    Post subject: float x --> not a number? Reply with quote  Mark this post and the followings unread

i've just checked out more functions from the manual today..
and now i'm wondering what..
[ function ] int isnan ( float x )
is x ”not a number”?
.. is for.

what x can be not-a-number?
do you have any examples?
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ge



Joined: Aug 13, 2006
Posts: 105
Location: Palo Alto, CA

PostPosted: Wed Nov 15, 2006 11:19 am    Post subject: Re: float x --> not a number? Reply with quote  Mark this post and the followings unread

kijjaz wrote:

what x can be not-a-number?
do you have any examples?


Here is an example that shows some ways to get "illegal" floats:

http://chuck.cs.princeton.edu/doc/examples/basic/infnan.ck
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kijjaz



Joined: Sep 20, 2004
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Location: bangkok, thailand
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PostPosted: Thu Nov 16, 2006 1:59 am    Post subject: Reply with quote  Mark this post and the followings unread

oh! it's there in the example!
thanks!..
this is totally cool!
me loves 0/0..

music with 0/0 timesignature is cool as well.
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kijjaz



Joined: Sep 20, 2004
Posts: 765
Location: bangkok, thailand
Audio files: 4

PostPosted: Thu Nov 16, 2006 4:24 am    Post subject: Reply with quote  Mark this post and the followings unread

oh i have another issue..
<<< 0.0 / 0.0 >>>; // works fine (not a number)
<<< 1.0 / 0.0 >>>; // works fine (infinity)
<<< 1 / 0.0, 0 / 0.0 >>>; // works fine also.
but 1 / 0 and 0 / 0 both kill ChucK..
i know we should test before dividing,
but should it kills the shred instead of killing the running chuck?
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ge



Joined: Aug 13, 2006
Posts: 105
Location: Palo Alto, CA

PostPosted: Thu Nov 16, 2006 6:40 pm    Post subject: Reply with quote  Mark this post and the followings unread

kijjaz wrote:

but 1 / 0 and 0 / 0 both kill ChucK..
i know we should test before dividing,
but should it kills the shred instead of killing the running chuck?

That is a bug! We need to catch those integer divide by zero!

Thanks for finding this. Also for the great work in tracking down other weirdness. We are planning a big round of bug hunt!!
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kijjaz



Joined: Sep 20, 2004
Posts: 765
Location: bangkok, thailand
Audio files: 4

PostPosted: Fri Nov 17, 2006 2:04 am    Post subject: Reply with quote  Mark this post and the followings unread

cool. i'll try to hunt some more down as i keep chucking along ^_^.
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