comment on

I have a program which, among other things, reads archived files containg the output of "show diagbus" on Cisco routers. The relevant strings I'm matching in my regex are:

L3 Engine: 0 - OC12 (622 Mbps)
L3 Engine: 1 - OC12 (622 Mbps)
L3 Engine: 2 - OC12 (622 Mbps)
L3 Engine: 4 - OC12 (622 Mbps)

Here's a code snippet:

%router_of_interest = (router1 => "1",
                       router2 => "1",
                       router3 => "1",
                       router4 => "1"
                      );

while ($file = readdir(DIA)) {
    if ($file =~ /(.*)\.bbnplanet.net/) {
        $router = $1;
        next unless exists $router_of_interest{$router};

open(DIAFILE,"$dir/$file") || die "Cannot open $dir/$file: $!\n";
    while ($line = <DIA>) {
    chomp $line;
    if ($line =~ /^\s*L3 Engine: (\d+)/i){
        $engine = $1;

        if (grep(/$engine/,@{$HoL_engine{$router}}) != 1){
           push @{$HoL_engine{$router}}, $engine;
       }
     }
   }
   if (exists $HoL_engine{$router}){
       $engine{$router} = join(",",sort @{$HoL_engine{$router}});
   }
   else {
        $engine{$router} = "NA"; #GSR IOS version too old
      }
   }
}

foreach $key (sort keys %engine) {
print "$key - Engine $engine{$key}\n";
}
[download]

this successfully prints:

router1 - Engine 0,2,
router2 - Engine 1,2
router3 - Engine 2
router4 - Engine NA

...etc.

Except, it won't print instances of:

router1 - Engine 0

Something about pushing one "0" and nothing else into my HoL fails. Can anyone help a poor Monk out?

In reply to Puzzling Hash of Arrays problem by Tuna

Are you posting in the right place? Check out Where do I post X? to know for sure.
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
Want more info? How to link or How to display code and escape characters are good places to start.


No such thing as a small change
	PerlMonks