approxEqual() has fooled me for a long time...

[so]

Btw it is the right behavior, and logical, maybe a mistype?
In your example it won't even use abs error.

On Wed, 20 Oct 2010 13:32:06 +0300, Lars T. Kyllingstad  
<public at kyllingen.nospamnet> wrote:

> (This message was originally meant for the Phobos mailing list, but for
> some reason I am currently unable to send messages to it*.  Anyway, it's
> probably worth making others aware of this as well.)
>
> In my code, and in unittests in particular, I use std.math.approxEqual()
> a lot to check the results of various computations.  If I expect my
> result to be correct to within ten significant digits, say, I'd write
>
>   assert (approxEqual(result, expected, 1e-10));
>
> Since results often span several orders of magnitude, I usually don't
> care about the absolute error, so I just leave it unspecified.  So far,
> so good, right?
>
> NO!
>
> I just discovered today that the default value for approxEqual's default
> absolute tolerance is 1e-5, and not zero as one would expect.  This
> means that the following, quite unexpectedly, succeeds:
>
>   assert (approxEqual(1e-10, 1e-20, 0.1));
>
> This seems completely illogical to me, and I think it should be fixed
> ASAP.  Any objections?
>
>
> Changing it to zero turned up fifteen failing unittests in SciD. :(
>
> -Lars
>
>
> * Regarding the mailing list problem, Thunderbird is giving me the
> following message:
>
>   RCPT TO <phobos at puremagic.com> failed:
>   <phobos at puremagic.com>: Recipient address rejected:
>   User unknown in relay recipient table
>
> Are anyone else on the lists seeing this, or is the problem with my mail
> server?


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