On Jul 28, Pandey Rajeev-A19514 said:
>In this subroutine, @FORMATTED_OUTPUT was filled up as a 2 dimensional
>array $FORMATTED_OUTPUT[$i][$j].
>sub ABC {
>...... SOME CODE
>return (\$rows, \$cols, [EMAIL PROTECTED]);
>}
WHY are you returning a reference to a scalar? If $rows is a reference to
an array, you can just return $rows. Returning \$rows means you have a
reference to a reference to an array. That's rarely useful.
What *are* $rows and $cols?
>In subroutine DEF, ABC is called, and the dimension of @buffer increased
>to 3, ie it became a three dimensional array and the array elements can
>be accessed as $buffer[0][$i][$j].
>sub DEF {
>my @buffer, $row, $col;
That is an improper statement.
my (@buffer, $row, $col);
> ($$row, $$col, @buffer) = ABC('INPUT', 'Interface', 'OUTPUT', 'IP-Address');
This is not going to work very well. If we correct the ABC() function to
return $rows, $cols, and [EMAIL PROTECTED], then why not just do:
my ($r, $c, $buffer) = ABC(...);
Now you have variables of the exact same form that you returned from
ABC(). $r and $c are whatever $rows and $cols are, and $buffer is a
reference to the @FORMATTED_OUTPUT array. You can't automagically turn an
array reference into an array by saying:
@array = [EMAIL PROTECTED];
which is what you were trying to do. All that does is store a reference
to an array as element 0 of @array. That's why you need to do
$buffer[0][$i][$j].
> PRINT (\$$row, \$$col, [EMAIL PROTECTED]);
I have no idea WHY you're sending a reference to the dereferenced $row.
PRINT($r, $c, $buffer);
Sending a reference to @buffer here, as you did, means that PRINT() would
be receiving a reference to an array, whose first element is a reference
to an array.
Then, when you'd say
my ($row, $col, @buffer) = @_;
in the PRINT() function, @buffer would be an array with one element: a
reference to an array, with one element, a reference to an array. That's
why you'd have to say $buffer[0][0][$i][$j].
In short, once your FIRST function returns a reference to an array, use it
as a reference to an array:
sub foo {
my @data = qw( john jacob jingleheimer schmidt );
return [EMAIL PROTECTED];
}
sub bar {
my $d = foo();
print $d->[2]; # 'jingleheimer'
}
bar();
--
Jeff "japhy" Pinyan [EMAIL PROTECTED] http://www.pobox.com/~japhy/
RPI Acacia brother #734 http://www.perlmonks.org/ http://www.cpan.org/
<stu> what does y/// stand for? <tenderpuss> why, yansliterate of course.
[ I'm looking for programming work. If you like my work, let me know. ]
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