OpenEuphoria

Re: Uninitialized Variables

• Posted by jbrown1050 at yahoo.com Mar 24, 2002
• 476 views

On  0, Andy Serpa <renegade at earthling.net> wrote:
> 
> Turns out sprint() is way slow.  Here's my solution
for now to detect 
> inf's or nan's, which are effectively the same for
my purposes:
> 
> constant inf = 1e300 * 1e300
> constant nan = -(inf/inf)
> constant inf_s = atom_to_float32(inf)
> constant inf_neg_s = atom_to_float32(-inf)
> constant nan_s = atom_to_float32(nan)
> constant nan_neg_s = atom_to_float32(-nan)
> constant bad_things = {inf_s, inf_neg_s, nan_s,
nan_neg_s}
> 
> type nan_or_inf(atom x)
> sequence x_seq
>   x_seq = atom_to_float32(x)
>   if find(x_seq, bad_things) then
>     return 1
>   else
>     return 0
>   end if
> end type
> 
> Then, when I need to check, I just:
> 
> if nan_or_inf(x) then... 
> 

You know, equal(x, inf) works fine for me. WHy not
just have bad_things
contain the nans only, and have an "is_nan" type?

And if you really need it, why not have a seperate
is_inf type? That would
allow you to distingush them.

I'm just wondering why you set it up this way, thats
all.

jbrown

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