Besides (and you've been at this a while so just do it) -w/use strict and
or die "can't open $path/newestm.txt: $!";
I'm guessing your %whop hash as member names as values and ... well, lets say IP addresses as keys. One way would be:
foreach $newm (@newest_members) {
  my $online;
  foreach my $whos_on ( values %whop ) {
    $online++ if $whos_on eq $newm;
  }
  my $star = '<b>*</b>' if $online;
  print <<EOF;
$newm $star -
EOF
}   # foreach newm

[download]
yes, wasteful and a map would probably be cool or $who_list = join '|', values %whop; and then if ($newm =~ /$who_list/ but you get the idea.

a

In reply to Re: Looking up a hash by value by a
in thread Looking up a hash by value by tanger

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.