Re: Is there a more elegant way to do null checks?

Awesome, thanks guys.  That really simplified things.  -David

On Wed, Mar 24, 2010 at 4:50 PM, Newman, John W <[email protected]
> wrote:

> The ! operator is the best
>
> ${(patient.name.first)!"<Not Entered>"}
>
> [#list (patient.diagnoses)![] as dx]
>  ${(dx.code)!"<Unknown>"}
> [/#list]
>
> [#if (template.scripts.inline.head)!{}?has_content]
>  Do something
> [/#if]
>
> For the last one there I am not 100% on the order of precedence, you may
> need an extra paren before the ?
>
>
> -----Original Message-----
> From: Jan Haderka [mailto:[email protected]]
> Sent: Wednesday, March 24, 2010 4:52 PM
> To: FreeMarker-user
> Subject: Re: [FreeMarker-user] Is there a more elegant way to do null
> checks?
>
>
> When I rewrote my tag files as macros, I produced a lot of bloated template
> code like so:
>
> [#if (template?? && template.scripts?? && template.scripts.inline?? &&
> template.scripts.inline.head??)]do something[/#if]
>
> Is there a more elegant way to check if the head value is empty? I have
>
> I'm not an expert, but would not something like:
>
> [#if (template.scripts.inline.head)??]do something[/#if]
>
> do?
>
> Jan
>
>
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------------------------------------------------------------------------------
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proactively, and fine-tune applications for parallel performance.
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