24 Apr
2009
24 Apr
'09
5:51 p.m.
On 04/24/2009 04:42 PM, Juha Heinanen wrote:
We used to write this, but had lots of issues. The problem happens for
example with @contact.uri.user, when there is no contact header.
Unfortunately the select function can return and error instead of
success with "" value in this case. (The can be also revisited) And 'if
(@contact.uri.user == "")' would evaluate to false because the left had
side value does not exist, which is wrong.
Miklos
Miklos Tirpak writes:
Both of them would return false. Btw, I do not think that empty value is
allowed for to tag, it's a very rare case, and could be covered with
some explicit check.
I vote fore keeping the support for "if
(@to.tag)" like expressions, and
adding the extra functions for more precise checks if necessary. So a
string value could evaluate to true if it exists and not "".
what if there is no to tag at all or if there is one, but its value is
""? I think it is easier to read and understand
"if (@to.tag)" then "if
(!strempty((a)to.tag))"
why don't you write 'if (@to.tag != "") ...'? that would be easy
to
understand.
-- juha