radhika wrote:
Hi,
I have a snippet of code as below.
Even when I return 0 or '', why does @blocks evaluate to true?
If rows returned are 0, then if(@blocks) should evaluate to false, correct?
...
sub do_something
{
my @row = @_;
return @row if(@row);
return '';
}
@blocks = do_something();
if([EMAIL PROTECTED])
When you return '', the @blocks array contains a single element with the
value ''. When you test an array with if(), you're evaluating the
array in scalar context, which returns the number of elements.
So "if([EMAIL PROTECTED])" is saying "if the @blocks array doesn't contain any
elements...". But it *does* contain the single '' element.
Your solution is to use:
return ();
or just
return;
This will cause @blocks to receive an empty list and your test will work
as you intend.
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