Question

I have an array in Perl I want to print with space delimiters between each element, except every 10th element which should be newline delimited. There aren’t any spaces in the elements if that matters.

I’ve written a function to do it with for and a counter, but I wondered if there’s a better/shorter/canonical Perl way, perhaps a special join syntax or similar.

My function to illustrate:

sub PrintArrayWithNewlines
{
    my $counter = 0;
    my $newlineIndex = shift @_;

    foreach my $item (@_)
    {
        ++$counter;
        print "$item";
        if($counter == $newlineIndex)
        {
            $counter = 0;
            print "\n";
        }
        else
        {
            print " ";
        }
    }
}

Answer 1

I like splice for a job like this:

sub PrintArrayWithNewlines {
    my $n = 10;
    my $delim = " ";
    while (my @x = splice @_, 0, $n) {
        print join($delim, @x), "\n";
    }
}