Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl Monk, Perl Meditation
 
PerlMonks  

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??

Here's a better version. I was going to wipe my scratchpad and saw that I could do one thing better ... then another ... then realized that there didn't need to be an identified element per subgraph...

#!/usr/bin/env perl use strict; use warnings; use List::MoreUtils(qw(uniq)); my @array = map {[split]} ("11 12", "11 13", "9 8 7", "3 4", "11 4"); my %g = (); for my $i (@array) { my @v = map {@$_} uniq map {$g{$_} or [$_]} @$i; @g{@v} = (\@v) x @v; } print join ("\n", map {join " ", sort {$a<=>$b} @$_} uniq values %g), +"\n";

Same output as above, although now the ordering of the lines is fortuitous. (But obviously can be set, if desired, by another sort.)

Hopefully it's a bit more clear that, since each iteration creates a complete set of associated vertices, the process finds the sets of vertices of the connected subgraphs of an arbitrary graph.

(Please pardon the enthusiasm, this is the kind of stuff I like to think about.)


In reply to Re^2: how to find combine common elements of an array? by jaredor
in thread how to find combine common elements of an array? by ihperlbeg

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



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • Outside of code tags, you may need to use entities for some characters:
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?
    Username:
    Password:

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

    How do I use this? | Other CB clients
    Other Users?
    Others having an uproarious good time at the Monastery: (22)
    As of 2014-08-27 16:58 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      The best computer themed movie is:











      Results (246 votes), past polls