Beefy Boxes and Bandwidth Generously Provided by pair Networks
XP is just a number
 
PerlMonks  

Re^2: Converting a Number into a Radical

by hdb (Prior)
on Dec 20, 2013 at 10:25 UTC ( #1067941=note: print w/ replies, xml ) Need Help??


in reply to Re: Converting a Number into a Radical
in thread Converting a Number into a Radical

I could not resist to write it out:

use strict; use warnings; use Math::Factor::XS 'prime_factors'; my $n = shift; ( $n and $n > 0 and $n == int $n ) or die "Need positive integer as in +put!\n"; my %p; $p{$_}++ for prime_factors( $n ); my $radical = 1; $radical *= $_ for grep { $p{$_}%2 } keys %p; print "sqrt( $n ) = ", sqrt( $n/$radical ), " * sqrt( $radical )\n";

What I was missing is a product function, like sum from List::Util. There is one in the replacement List::Util that comes with Scalar::Util but that means overwriting the standard module which makes me feel uncomfortable.


Comment on Re^2: Converting a Number into a Radical
Select or Download Code

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1067941]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others chilling in the Monastery: (6)
As of 2015-07-03 20:18 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









    Results (56 votes), past polls