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The other issue here
is programmer-vs.-designer people who might work on a page.
I'd rather give a
designer something that looked like HTML, something they're
used
to, than have to
introduce any of several Java programming constructs.
That said, I have a
heavy mix of both custom tags and scriptlets on our site
because
a) I'm also one of
the designers and I can get away with it and b) sometimes it's
quicker
to do a scriptlet
than generalize functionality into a tag.
Dave
--
Dave Newton, [EMAIL PROTECTED]
Some people, myself included, for the sake of uniformity and design,
would like to maximize the usage of XML-like JSP tags. I would
love if all my server-side java code could be either packed away behind beans,
or hidden behind XML-like JSP tags. I think all of us would love this
also, though sometimes this is not feasible.
Brett
-----Original Message-----
From: Borislav
Iordanov
Sent: 2001-06-06 (수) 오후 8:55
To:
[EMAIL PROTECTED]
Cc:
Subject: RE: RE:
If/Else tag?
Hi,
I'm just wondering, what's wrong with scriplets.
I'm really failing to find any value in a tag "replacement" of the usual and
natural Java if statement. It seems to me that the useful conditional tags
are the ones with some predefined and parametrizable (in a simple way)
conditions, like the <req:ifParameter name="..." value="..."> and even
then.... what's the point? Is it just that for you something
like:
<utils:if predicate='<%= ...
%>'>
</utils:if>
looks better than
<% if
(....) %>
<% } %>
Just asking, because I'm really
wondering whether there's some inherent advantage in having tags instead of
scriplets, or it's simply a matter of personal taste and some prefer writing
tags.
Borislav
-----Original Message-----
From: Amos
Shapira [mailto:[EMAIL PROTECTED]]
Sent:
Tuesday, June 05, 2001 2:12 AM
To:
'[EMAIL PROTECTED]'
Subject: RE: RE: If/Else
tag?
Sorry, but if the purpose of taglibs is, among other
things,
to make the code more readable and maintainable then
such
tricks are not helping this goal, IMHO.
Also - what about
nested "if/else"?
Starts to look like old-fasioned basic to me (the
one on
Genie II and XT ROM Basic, not Visual Basic) :-)
I'll stick
to scriptlets for now, as much as I'd like to
avoid
them.
Cheers,
--Amos
-----Original
Message-----
From: Mikko Kurki-Suonio [mailto:[EMAIL PROTECTED]]
Sent:
Tuesday, June 05, 2001 8:45 AM
To:
'[EMAIL PROTECTED]'
Subject: Re: RE: If/Else
tag?
On Tue, 5 Jun 2001, [utf-8] Amos Shapira wrote:
>
I considered this but:
>
> 1. It's not always clear
(especially if the predicate is complex) that
the
> "else" predicate is the opposite of the
"if".
> 2. Worse - whenever you change the "if" predicate you have to
remember
> to change the "else" too.
Very unmaintainable over time.
> 3. It's not clear that the two are
actually related to each other.
> 4. You have to consider side-effects
(as you said - if the "if" changes
> "x", but
also if the evaluation of "x" has side effects).
Simple. Just set a
DIFFERENT flag variable whenever you trip the "real IF"
and test the
_flag_ for the "ELSE".
In pseudocode:
x_else_flag =
true;
if x then x_else_flag = false; blah blah blah;
if
x_else_flag then
do_the_else_thingy;
//Mikko
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