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package Graph::Easy::Util;
use strict;
use warnings;
use base 'Exporter';
our @EXPORT_OK = (qw(first_kv ord_values));
use List::Util qw(minstr);
=head1 FUNCTIONS
=head2 first_kv($hash_ref)
The first key value pair from a hash reference - lexicographically.
=cut
sub first_kv
{
my $href = shift;
my $n = minstr( keys(%$href) );
my $v = $href->{$n};
return ($n, $v);
}
=head2 ord_values($hash_ref)
The values of the hash ordered by a lexicographical keyname.
=cut
sub ord_values
{
my $href = shift;
if ((!defined $href) || (! %$href))
{
return (wantarray ? () : 0);
}
else
{
return (wantarray ? @{$href}{sort keys( %$href )} : scalar(keys(%$href)));
}
}
1;
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