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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.

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[RonW]: thanks
[LanX]: I thought MST perl was obvious ;-)
[RonW]: I have so much accumulated in my memory that finding the right item at a given moment often fails

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