alright... i looked at Graph, which has a directed mode (i assume that's what you mean by uni-directed - i'm thinking uni is one, so one direction -, i could be wrong)
for an undirected graph, you could use $g->connected_components. i don't think it explicitly says how to get this for a directed graph. you'd have to roll your own... my idea is at least O(n^2) so there's probably a better way, but here ya go:

sub di_graph_connected {
    my $g = shift; # $g is of type 'Graph'
    my @verts = $g->vertices;
    my @pairs = ();
    foreach my $front ( @verts ) {
        foreach my $back ( @verts ) {
            push @pairs, [ $front, $back ] if $g->has_edge( $front, $b
+ack );
        }
    }

    return @pairs;
}
[download]

(code untested)
hope this helps!

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

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! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, 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, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&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.