Re: Change rounding mode

I see. I'm afraid FreeMarker can't easily help you with that -- we're  
relying on java.text.DecimalFormat, and it doesn't have a configurable  
rounding... Daniel's solution would work, though... You could even  
extend it to use automatic escaping:

<#function round2 n>
     <#if n?is_number><#return ((n*100)?round/100)? 
string><#else><#return n></#if>
</#function>

<#escape x as round2(x)>
... rest of your template here ...
</#escape>

And it'd automatically format all numbers emitted from within the  
escape block to two decimals.

Attila.


On Oct 15, 2008, at 2:28 PM, David Cuenca wrote:

> I would like to change the formatting that freemarker uses to show a  
> Double with only two decimal positions (${x?string("0.##")}). I want  
> freemarker to round it with the half-up rule.
>
> Daniel Dekany wrote:
>> Wednesday, October 15, 2008, 9:23:58 AM, David Cuenca wrote:
>>
>>
>>> Hello,
>>>
>>> I would like to know if there is an easy way to change freemarker's
>>> default rounding mode. As the freemarker manual says:
>>>
>>> "Following the financial and statistics practice, the rounding goes
>>> according the so called half-even rule, which means rounding  
>>> towards the
>>> nearest ``neighbor'', unless both neighbors are equidistant, in  
>>> which
>>> case, it rounds towards the even neighbor..."
>>>
>>> But I would like to use HALF_UP.
>>>
>> Out of curiosity, why?
>>
>> Otherwise I don't think it's possible in FreeMarker, since it's  
>> number
>> formatting is what the Java platform provides, and DecimalFormat uses
>> half-even rounding, and it isn't configurable in this regard. That
>> said, you couldn't even do that in a Java program. So, blame the J2SE
>> API guys... ;)
>>
>> Of course, you could write the function for this easily:
>>
>> <#function n3 n>
>>   <#return ((n*1000)?round/1000)?string>
>> </#function>
>>
>>
>>> Does anybody know if it's configurable?
>>>
>>> Thanks!

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