Re: [xsl] nested grouping problem

[David Carlisle <davidc@xxxxxxxxx>]

On 04/10/2010 18:48, Terry Ofner wrote:
> I am mystified as to how the<xsl:if test="position()!=1">;</xsl:if>
> knows to put the semicolon after every grouped @main item except the
> last one.

it doesn't:-)

it puts a semicolon _in front_ of every item except the first.

Incidentally I think I saw somewhere Michael commenting that for long 
sequences

<xsl:for-each select=....>
<xsl:if test=position()!=1>,</xsl:if>
<foo/>
</xsl:for-each>

is more efficient (or at least more easily streamed, or something) than 
the otherwise equivalent


<xsl:for-each select=....>
<foo/>
<xsl:if test=position()!=last()>,</xsl:if>
</xsl:for-each>


as in the first case you can start outputting straight away but the last 
case you need either to delay until you know last() (ie the length of 
the sequence) or you have an optimiser smart enough to know you don't 
really need to know the value of last() just that ther eis another one 
coming up....


David