Beefy Boxes and Bandwidth Generously Provided by pair Networks
Clear questions and runnable code
get the best and fastest answer
 
PerlMonks  

comment on

( [id://3333]=superdoc: print w/replies, xml ) Need Help??

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 ); }

the lowliest monk


In reply to Re: Algorithm for cancelling common factors between two lists of multiplicands by tlm
in thread Algorithm for cancelling common factors between two lists of multiplicands by BrowserUk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • 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.
Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Chatterbox?
and the web crawler heard nothing...

How do I use this?Last hourOther CB clients
Other Users?
Others studying the Monastery: (5)
As of 2024-03-29 07:36 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found