Re: print one row of array

[thunders]

I'm confused by your termonology, but if by "one row" you mean a single entry, you need to use the subscript.

my @array = ("red","yellow","blue","green");

print $array[0]; #prints red
print $array[1]; #prints yellow
#and so on

see perldata for more info.

[QM]

By one definition, arrays in Perl are only one dimensional, so there is only one row (or column) to print.

For instance, examining a 2D array in the debugger gives:

  DB<1> @x = ( [qw(a b c)], [qw(d e f)], [qw(g h i)])

  DB<2> x @x
0  ARRAY(0x15d5240)
   0  'a'
   1  'b'
   2  'c'
1  ARRAY(0x1cbe3f4)
   0  'd'
   1  'e'
   2  'f'
2  ARRAY(0x1cbe430)
   0  'g'
   1  'h'
   2  'i'
  DB<3>

This shows, for instance, that $x[0] is an array reference (ARRAY(0x15d5240)), and points to an array equivalent to qw(a b c).

To print a single row of a multidimensional array, you must first define which is the row index.

For the first index, this works:

my @x = ( [qw(a b c)], [qw(d e f)], [qw(g h i)]);
my $row = 1; # print this row
foreach my $col (0..$#{$x[$row]} )
{
    print "$x[$row][$col]\n";
}

prints

d
e
f

If you need something more general, speak up.