Hi,

Thanks for the reply. I am using perl version 5.8.4 which you had suggested earlier.

I have been playing with the code...but could not understand: 

        last if keys %$lookfor == grep defined, values %$lookfor;
        $line =~ $_ and $lookfor->{ $_ } = $line for keys %{ $lookfor 
+};

[download]

I understand it means that for keys %{ $lookFor }, if $line =~ $_, then $lookFor->{$_} = $line...but was not sure what if keys %$lookfor == grep defined, values %$lookfor meant.

Also, had a little trouble understanding what the following means... (what does < do ?) : 

sleep 1 while grep( $_, @dones ) < @cmds;

[download]

I understood that when the keywords are found, kill 1, $pid immediatly kills the pid for that particular thread, but does it also stop the other 3 threads that are still going on?

Thank you.

In reply to Re^4: question about running a system and a perl function background by Anonymous Monk
in thread question about running a system and a perl function background by Anonymous Monk

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.