CUFP
mirod
snippet
<div class="Description"><p>I often run scripts that have to run for a while and that do not output anything. So I like to see how they are doing, if they are just sitting there waiting for something to happen, or maybe stuck in an infinite loop.</p>
<p>So I use this subroutine to display an indicator of how many times I have been through my main loop on STDOUT.<p>
<p>Its used this way:</p>
<pre> while(...)
{ # whatever you have to do
progress();
}
</pre>
<p>As I use in various situations the main loop can be run any time from a few hundred to several tens of thousand times, so you can pass a parameter or change the DEFAULT_STEP constant to display a dot for every n loops. After 10 dots a space is printed, and after 50 a new line (those values can also be changed).</p>
<p>One last thing: if you want to see the dots displayed as soon as they are generated don't forget to unbuffer the output, for example with <tt>$|=1;</tt></p>
<p>Oh and if the features of this progress indicator are not what you are looking for, here is a list of previous nodes on that subject:</p>
<ul></li>[A whirleygig for a progress indicator for scripts]</li>
<li>[File copy progress.]</li>
<li>[Spinning progress bar.]</li>
<li>[progress bars]</li>
</ul></div>
<CODE>
{ use constant DEFAULT_STEP => 100; # a DOT is printed every DEFAULT_STEP call
use constant LINE => 50; # nb of DOT per line
use constant BLOCK => 10; # a SPACE is printed after BLOCK DOTs
use constant DOT => '.'; # probably no need to change this
use constant SPACE => ' '; # probably no need to change this
my( $i, $j);
sub progress
{ my $step= shift || DEFAULT_STEP;
$i++;
if( $i == $step)
{ $i=0;
print STDOUT DOT;
$j++;
unless( $j % BLOCK)
{ print STDOUT SPACE;
if( $j == LINE)
{ $j=0;
print STDOUT "\n";
}
}
}
}
}
</CODE>