[MTOS-dev] testing var for empty before using in mt:loop

[Beau Smith]

Steve_

Here are two examples that will work if foo_loops is null or "" or 0....

------------

<mt:if name="foo_loops">
     <mt:loop name="foo_loops">
         ...
     </mt:loop>
<mt:else>
     zero-state message here
</mt:if>

------------

<mt:loop name="foo_loops">
     ...
<mt:else>
     zero-state message here
</mt:loop>

------------


_beau




On May 1, 2008, at 3:39 PM, Steve Ivy wrote:
> In this case, the code does a lookup of "all URIs for this Friend" and
> assigns it to a param. It may be empty. In the tmpl, I want to show a
> "No URIs" message instead of dropping into the loop if uris has no
> entries.
>
> On Thu, May 1, 2008 at 3:34 PM, Timothy Appnel <tim at appnel.com> wrote:
>> Meaning null or '' or 0? Yes. Meaning an array refeence with zero
>> elements? No. Not with mt:if in that position though I think the loop
>> would never start if coo_loops was a reference to an empty array
>> reference.
>>
>> Anyway, the mt:if statement and others follows the standard Perl
>> evaluation of true and false values. Null, '' (blank string) or 0
>> (zero) is false and everything else is true.
>>
>>
>>
>> <tim/>
>>
>> --
>> Timothy Appnel
>> Appnel Solutions
>> http://appnel.com/
>>
>
>
>
> -- 
> Steve Ivy
> http://redmonk.net // http://diso-project.org
> This email is: [ ] bloggable [x] ask first [ ] private
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