----- Original Message -----
From: "Shawn Bayern" <[EMAIL PROTECTED]>
To: "marba" <[EMAIL PROTECTED]>
Sent: Tuesday, April 09, 2002 6:36 PM
Subject: Re: how can I compare strings in c:if
> On Tue, 9 Apr 2002, marba wrote:
>
> > > Make sure that the two strings in your database don't have different
> > > amounts of whitespace, are indeed of the same case (uppercase,
lowecase,
> > > etc.), and so on. I often find it useful to print out values with a
> > > marker (e.g., the ' character) on both sides to make sure I'm not
missing
> > > any whitespace.
> >
> > Also tryed comparing two fields from a "sef" join (select * from A
> > left join A) but they evaluate different. Your code runs OK. Any hint?
>
> Did you try printing out both strings to ensure they're equal?
>
> Shawn
>
I tryed printing even the fields surrounded by apices (') as you suggested.
Anyway being the same field repeated in the self join it should be
equal.(and it prints equal)
I think i guess the problem with this code:
<c:set var ="x" value="${row.columns[i + campi]}"/>
<c:set var ="y" value="${row.columns[i]}"/>
<c:if test="${x < 'y'}">
<c:out value="minore"/>
</c:if>
// this is OK
<c:if test="${x < y}">
<c:out value="minore"/>
</c:if>
this last causes an exception:
javax.servlet.ServletException: Attempt to apply operator "<" to arguments
of type "org.apache.taglibs.standard.tag.common.sql.ColumnImpl" and
"org.apache.taglibs.standard.tag.common.sql.ColumnImpl"
I guess if the compiler does'nt coerce x and y to String they don't evaluate
equal.
Marco
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