Hello there!
As we know and as Larry Wall said in a Camel-book 0 in scalar variable is equal to undef. I have in my database PID columns with unique values. When I try to perform this column data by "while my $pid = $sth->fetchrow_array()" I lost one record because it has the "0" value. How could I pass this situation?
while ( defined ( my ($pid) = $sth->fetchrow_array ) ) {
}
This hits to the heart of the question and whether or not that is a typo in the original message. Specifically--
0 in a scalar variable is NOT equal to undef; however both are false. The above specifically checks for definedness, as opposed to truth.
I thought I would highlight this since it is a fairly tricky concept in Perl (and programming in general).
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Lawrence Statton - [EMAIL PROTECTED] s/aba/c/g
Computer software consists of only two components: ones and
zeros, in roughly equal proportions. All that is required is to
sort them into the correct order.
http://danconia.org
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