Fellow monks, I ask again for your help. This one's got me completely stumped...

Following is my code, verbatim: 

local $network_ifs = `netstat -i | grep -Ev "lo|sit|link|Name" | cut -
+f1 -d" " | uniq | sort -n`;
foreach (split("\n", $network_ifs)) {
    push @tcp_utilization_metrics, "$_";
}
%tcp_utilization_adapter_names = ();
foreach $network_if (@tcp_utilization_metrics) {
    local $if_name = $network_if;
    if ($network_if =~ /en/) {
        $network_if =~ substr ($network_if, 2, 0, "t");
    }
    if ($network_if =~ /tr/) {
        $network_if =~ substr ($network_if, 1, 2, "ok");
    }
    if ($network_if =~ /at/) {
        $network_if =~ substr ($network_if, 2, 0, "m");
    }
    print "$if_name: $network_if\n";
    $tcp_utilization_adapter_names{"$if_name"} = "$network_if";
    print "$tcp_utilization_adapter_names{$if_name}\n";
}
foreach (@tcp_utilization_metrics) {
    print "$tcp_utilization_adapter_names{$_}\n";
}

[download]

And following is the program's applicable output (with empty lines indicated): 

en0: ent0   
ent0        
en1: ent1   
ent1        
(empty line)
(empty line)

I've been over and through this code, and I just can't figure out what's wrong. Can anyone else see it? Many thanks and much appreciation!

In reply to Simple hash assignment...or is it? by arootbeer

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