25 Oct
2018
25 Oct
'18
3:54 p.m.
Greetings,
I found an odd behaviour in Kamailio and i would like to know if it's
intentional.
I've made this snippet for showing :
$var(teste) = $null;
if($var(teste) == "Test")
{
xerr("TEST : If returned true");
}
The "if" returns true if the $var is $null or 0.
I'm using the "cmp_str()" now in order to avoid this issue.
Best Regards,
Duarte Rocha
25 Oct
25 Oct
4:23 p.m.
Just out of curiosity, will this yield the same result?
if($var(teste) eq 'Test')
?
--
Sent from mobile. Apologies for brevity and errors.
-----Original Message-----
From: Duarte Rocha <duarterocha91(a)gmail.com>
To: sr-users(a)lists.kamailio.org
Sent: Thu, 25 Oct 2018 8:55 AM
Subject: [SR-Users] Odd behavior comparing strings
Greetings,
I found an odd behaviour in Kamailio and i would like to know if it's
intentional.
I've made this snippet for showing :
$var(teste) = $null;
if($var(teste) == "Test")
{
xerr("TEST : If returned true");
}
The "if" returns true if the $var is $null or 0.
I'm using the "cmp_str()" now in order to avoid this issue.
Best Regards,
Duarte Rocha
6:07 p.m.
On Thu, Oct 25, 2018 at 03:10:32PM +0100, Duarte Rocha wrote:
With "eq" it works as it should.
Well, in principle, '==' ought to work as it should, too. It's still odd
behaviour, I would agree.
However, 'ne' and 'eq' are the operators explicitly designed for string
comparisons. '==' and '!=' attempt to make appropriate type inferences
based on the types of the operands, and as one can see, not necessarily
consistently or correctly.
-- Alex
--
Alex Balashov | Principal | Evariste Systems LLC
Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
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Alex Balashov -
Duarte Rocha