[chuck-users] Feature request

Mike McGonagle mjmogo at gmail.com
Wed Feb 8 13:49:26 EST 2006


Thanks, Ge. It is starting to sound like the next release can't come
soon enough...

Guess I will just have to figure out how to compile from the CVS
stuff... only to be on the bleeding edge...

Mike


On 2/8/06, Ge Wang <gewang at cs.princeton.edu> wrote:
> Hi Mike!
>
> > I was wondering if it would be possible to include some method of
> > determining if a function returns 'nan'?
>
> This is a great idea.  Added and committed to CVS.
>
>    int math.isinf( float )
>    int math.isnan( float )
>
> Also adding examples/basic/infnan.ck
>
>    // big number
>    1000000000000000000000000000.0 => float n;
>    // overflow it
>    repeat( 20 ) n *=> n;
>    // test it
>    <<< math.isinf( n ) >>>;
>    // bye sanity
>    0 *=> n;
>    // test it
>    <<< math.isnan( n ) >>>;
>
>    // more
>    <<< 1.0 / 0.0 => math.isinf >>>;
>    <<< 0.0 / 0.0 => math.isnan >>>;
>
> So far, this seems portable on osx, linux, win32.  We will see if
> and how it breaks under different systems as we go.
>
> Best,
> Ge!
>
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>


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