Even/Odd/Prime, etc?

Ovid on 2008-02-16T09:42:45

I know it's on the CPAN, I just can't find it yet. I want a module which does something like this:

use Number::Properties ':all';
my @odds   = grep { odd   $_ } @num_list;
my @evens  = grep { even  $_ } @num_list;
my @primes = grep { prime $_ } @num_list;
my @negatives = grep { negative ...

You get the idea.

Is it out there?

Not that I know of

Yanick on 2008-02-16T17:39:32

I'm of aware of something exactly like that, although I've hacked stuff similar to it over, e.g., Math::Prime::TiedArray when playing at Project Euler. In fact, gathering all those is_(prime|abundant|fibonacci|*) functions under a Number::Class (still trying to find a better name for it) module is something I want to do when I'll have truckloads of round tuits to spend (ah!).

Hm.

rjbs on 2008-02-16T18:50:21

perl -MNumber::Properties=prime \
     -MList::MoreUtils=lastval \
     -E '$x = lastval { prime } 2 .. Inf;
         say "the largest prime number is $x"'

Re:Hm.

Ovid on 2008-02-19T07:00:30

That's beautiful :)