Re: [xsl] XSLT repetition constructs

["Mukul Gandhi gandhi.mukul@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

Hi all,
    I've updated the document I've prepared, at the same link (
http://gandhimukul.tripod.com/xslt/xslt_repetition_constructs.pdf)
discussing fold-left() and fold-right() functions as well.

I hope to edit the document I've prepared as I learn more about this topic.
Any more comments are welcome as well.

On Tue, Mar 5, 2019 at 9:29 PM Michael Kay mike@xxxxxxxxxxxx <
xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:

> You might also consider including fold-left() and fold-right(). In many
> ways these are similar to xsl:iterate in that they represent an
> "accumulating" iteration where a value is computed as the output of one
> iteration and supplied as input to the next. The main differences are (a)
> xsl:iterate has multiple iteration parameters, fold-left/fold-right only
> have one; (b) xsl:iterate has a break option, fold-left/fold-right do not.
>
> You can't assume that recursion will be inefficient (either in time or
> space). It all depends on the implementation. With tail call optimization,
> there should be very little difference.
>
> There's also, of course, the option of "for $x in...", and the bang
> operator (and indeed the "/" operator). The bang operator (!) is
> semantically equivalent to xsl:for-each.
>
> Michael Kay
> Saxonica
>




-- 
Regards,
Mukul Gandhi