On 02-04-08 03:09:41 CEST, Marcel Juffermans wrote:
> In OpenSSL.pm there is a code snippet:
>
> if( not(defined($outfile)) || $outfile eq "" ) {
> <snip/>
> } else {
> <snip/>
> }
>
> This doesn't seem to work as expected - if $outfile is undefined, then the
> else clause is taken.
>
> It works as expected if the condition is changed to use 'or' instead of
> '||':
>
> if( not(defined($outfile)) or $outfile eq "" )
if (!defined($outfile) || $outfile eq "") {
would work too
> or even just:
>
> if( !$outfile )
100% correct, both the undefined value and the empty string (and a zero
and a string "0") evaluate to a boolean false, so the expression is
overly redundant anyway.
and the undefined value evaluates to the empty string in string
comparison, so
if ($outfile eq "") {
has the same behaviour.
rj
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