Beefy Boxes and Bandwidth Generously Provided by pair Networks
We don't bite newbies here... much

comment on

( [id://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

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.