On Friday, 28 December 2012 at 20:19:49 UTC, Simen Kjaeraas wrote:
On 2012-42-28 16:12, Zhenya <[email protected]> wrote:
Hi!
Tell me please,are there any way to check whether number is
NaN?
us std.math.isNaN. But if you really don't want to:
float x = ...;
if (x != x) {
writeln( "x is NaN" );
}
I'm unsure how aggressive the optimizer is allowed to be in
cases
like this. Theoretically it could assume x is always equal to x,
but I'd think it's not allowed to for floats.
If you're wondering how a float value could compare different to
the exact same value, consider that this would otherwise be
true:
sqrt(-1) == 0/0
Thank you,understood)
It's a nice way.
