Re: [xsl] using preceding-sibling to calculate acummulated amount

[Wendell Piez <wapiez@xxxxxxxxxxxxxxxx>]

Hi Jaime,

At 11:33 AM 7/7/2004, you wrote:
> I need to show in HTML a column of a table that shows the acummulated 
> quantity... If, for example, I have:
>
> <row>
>   <total>1</total>
> </row>
> <row>
>   <total>2</total>
> </row>
> <row>
>   <total>3</total>
> </row>
> <row>
>   <total>4</total>
> </row>
>
> I want to show in HTML:
>
> 1
> 3
> 6
> 10
>
> I tried:
> total + preceding-sibling::total
>
> but it didn't work.

Fun.

Assuming your context node is each row element in turn,

sum(total | preceding-sibling::row/total)

should work. (Short for sum(child::total | 
preceding-sibling::row/child::total) )

The "+" operation won't work for this since the second argument 
"preceding-sibling::total" isn't a number (even if it did return anything, 
it'd be a node set). To add the numerical values of nodes in a set you can 
use the sum() function.

More complex cases can be, um, "baroque".

Cheers,
Wendell


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Wendell Piez                            mailto:wapiez@xxxxxxxxxxxxxxxx
Mulberry Technologies, Inc.                http://www.mulberrytech.com
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Suite 207                                          Phone: 301/315-9631
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