I think the problem here is you haven't really laid out all the possible scenarios. Let's try doing this in English and we'll see where we get: You haven't addressed the possibility that (major_length is neither 4800 nor 8852) nor that (major_length is 8852 but val is neither 1 nor 4). Now, it may be that in your application these scenarios are impossible, but the ?: operator does not allow you to simple ignore them. You may find it easier to use an if-else construct instead: 
if ($major_length == 4800) {
   $result = 18;
} elsif ($major_length == 8552) {
    if ($val == 4) {
        $result = 33;
    } elsif ($val == 1) {
        $result = 18;
    }
}

[download]
You still have the possibility of those unhandled situations, but now they'll simply result in $result not getting assigned at all.

In reply to Re: nested tabular ternary by Errto
in thread nested tabular ternary by bowei_99

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