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Re: Returning a nil float?

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Re: Returning a nil float?

Subject: Re: Returning a nil float?
From: Greg Guerin <email@hidden>
Date: Fri, 29 Jan 2010 20:00:28 -0700

Chunk 1978 wrote:

so above i'd like to write "if (!sound) return nil;".  my reasoning is
because some attributes to a sound object (like pan) are created only
when the sound is initialized.  if there is no sound object than there
should also be no pan value to return.  unfortunately, the float
default 0.0f is also the default value for pan (range from -1.0 to
1.0).

You could return NaN to signify "no pan value".

You should read up on the characteristics of NaNs, though. They don't compare equal to anything, even another NaN or itself. Using them in arithmetic also yields "interesting" results.

man nanf
man isnan

http://en.wikipedia.org/wiki/NaN

  -- GG

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