On Tue, 25 Sep 2001, Christine Lenda wrote:
> I remember someone mentioning that there may be a
> precedence problem with "unexpected results" during a
> mathematical conditional test, using the keywords
> "and" and "or"...instead of the symbols (&& and ||).
> Is this true? Can anyone give me an example?
Yes, || and && have a higher precedence than 'and' and 'or'. This can
especially be a problem when you are doing an assignment, since = has a
higher precedence than 'and' and 'or', but lower than || and &&, so these
two statements are NOT the same:
my $error = last_error() || next_error() || 'NONE;;
my $error = last_error() or next_error() or 'NONE';
(the second would assign the return value of last_error to $error first,
then do the ors after it).
but
my $error = (last_error() or next_error() or 'NONE');
would do what you expect (do the stuff inside the parentheses and then
assign)
-- Brett
http://www.chapelperilous.net/
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