Here's a another solution. It takes two array refs, makes copies of them, and cancels out common terms, removing all 1's.
sub list_reduce {
my ( $top, $bot ) = map [ grep $_ != 1, @$_ ], @_;
die "Bad data\n" if ( grep $_ < 1, @$top, @$bot );
OUTER:
for my $i ( reverse 0 .. $#$top ) {
for my $j ( reverse 0 .. $#$bot ) {
( $top->[ $i ], $bot->[ $j ] ) = reduce( $top->[ $i ], $bot->[ $
+j ] );
splice @$bot, $j, 1 if $bot->[ $j ] == 1;
if ( $top->[ $i ] == 1 ) {
splice @$top, $i, 1;
next OUTER;
}
}
}
return ( $top, $bot );
}
sub reduce {
my ( $top, $bottom ) = @_;
my $gcd = Math::BigInt::bgcd( $top, $bottom );
return ( $top/$gcd, $bottom/$gcd );
}
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.