nattimonk:

In general, to display status on long-running operations, I use something like this:

print " \r", $status; I often put extra blanks at the beginning when my status value isn't necessarily going to always be the same length or longer for each successive value. That way extra characters from a previous status value doesn't hang around.

However, in order to get the output to work the way you intend, you also need to ensure that the value is written immediately, otherwise your status lines may seem to hang or display in "bursts". So I also turn on automatic flushing on the output file handle. So here's a trivial example:

#!/usr/bin/perl
use warnings;
use strict;

$|=1;  # Turn on automatic flushing on stdout
for (0..1000) {
        my $status = substr(rand,0,5);
        print "     \r", $status;
        sleep 5;
}
[download]

--roboticus

---

---

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! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

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:
	&		&
	<		&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.