Hi Perl Monks,
I have been trying to develop this simple code of a progress indicator of a twirling baton. The problem is arising from the sleep function which seems to block all print output (even before the sleep statement.) Is this some sort of bug with the sleep function? This is the code that i have: 
sub rotate_line {
    my $interval = 1;   # Sleep time between twirls
    my $tcount = 0;     # For each tcount the line twirls one incremen
+t
    
    while ($interval) {
        $tcount++;
        print "$tcount\n";
        switch ($tcount) {
            case 1 {
                printf '-';
                sleep $interval;
            }
            case 2 {
                print "\\";
                sleep $interval;
            }
            case 3 {
                print "|";
                sleep $interval;
            }
            case 4 {
                print "/";
                sleep $interval;
            }
            else {
                $tcount = 0;
            }
        }
    }
}

[download]
I have been searching for some sort of replacement for the sleep function but have not been successful. Any advice would be greatly appreciated.
Thank you,
Perl noob

In reply to Twirling baton progress indicator in Perl by axl163

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • 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! —
  • 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:
    & &amp;
    < &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.