On Fri, Mar 28, 2014 at 3:05 PM, Dr.Ruud <[email protected]> wrote:
> if ($@) {
>> die "$@";
>> }
>>
>
> Never test $@, only use the value of $@ after a failed eval.
>
Why not? The perldoc eval shows:
If the code to be executed doesn't vary, you may use the eval-BLOCK form to
trap
run-time errors without incurring the penalty of recompiling
each time. The error,
if any, is still returned in $@. Examples:
# make divide-by-zero nonfatal
eval { $answer = $a / $b; }; warn $@ if $@;
# same thing, but less efficient
eval '$answer = $a / $b'; warn $@ if $@;
# a compile-time error
eval { $answer = }; # WRONG
# a run-time error
eval '$answer ='; # sets $@
--
a
Andy Bach,
[email protected]
608 658-1890 cell
608 261-5738 wk
