Re: [xsl] XSLT repetition constructs

Subject: Re: [xsl] XSLT repetition constructs
From: "Martin Honnen martin.honnen@xxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Thu, 7 Mar 2019 13:27:46 -0000
Am 07.03.2019 um 12:55 schrieb Michael Kay mike@xxxxxxxxxxxx:
A good simple use case for fold-left() is to accumulate a running total, i.e. turn (1,2,3,4) into (1,3,6,10).

The example to simply compute the running total (e.g. map (1,2,3,4) to 10) is in the spec with

B B fold-left((1 to 4), 0, function($a, $b) { $a + $b})

But to map the whole sequence (1,2,3,4) with fold-left to a new sequence of (1,3,6,10) I am already struggling to express that in a compact way, is

B  (1 to 4),
B  (),
B  function ($a, $b) {B  $a, if (empty($a)) then $b else $b + $a[last()] }

a good way? Or can the third argument, the function be expressed in a more compact way?

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