|
|
|
| Perl: the Markov chain saw | |
| PerlMonks |
Re^4: NaNs are true (NaN == 0 -> true? Really?)by BrowserUk (Patriarch) |
| on Feb 27, 2011 at 12:11 UTC ( [id://890401]=note: print w/replies, xml ) | Need Help?? |
|
I think all of those are correct, though not particularly useful. They should also prompt (at least) a warning, though I think a catchable exception is better. You also have to be careful to distinguish between a variable containing NaN, and a constant NaN I think. That is, I think the only time any comparison involving a variable containg NaN should result in a true value, is if it is compared against a predefined constant NaN; were one to be provided. Though an isNaN( $x ) function or equivalenly $x->isNan() method would serve the same purpose and be less likely to confuse. Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
In Section
Seekers of Perl Wisdom
|
|
||||||||||||||||||||||