Hi Andy --
On Thu, Mar 28, 2024 at 01:06:10PM +0000, Andy Bunce scripsit:
> hof:until is not gone, it is just hiding [1]
> - In 10.7 it is there but undocumented in Wiki
Which is useful to know -- thank you! -- but makes me think a bunch of
my production code is going to break hard when 11 is released. I would
really like to avoid that. (In particular, the conversation with
management about how much refactoring work will be required.)
> - In BaseX 11 you need to use XQuery 4 fn:while-do⁺, fn:do-until⁺ [2]
It is very probably my brain, but I'm having trouble transposing
hof:until to those functions. I can an implement what I want to do with
hof:until like so:
declare function xc:dropTableLinesFancy($in as node()*) as node()* {
let $result as map(*) :=
hof:until(
(: are we done? (= we've run off the end of our list of nodes ) :)
function($m) {
empty($m?oldNodes)
},
(: create new list of line elements :)
function($m) {
map {
'oldNodes': tail($m?oldNodes),
'newNodes': ($m?newNodes,
switch (true())
case starts-with(head($m?oldNodes),':stab') return <line/>
case starts-with(head($m?oldNodes),':rtab') return <line/>
case $m?toggle return <line/>
default return head($m?oldNodes)
),
'toggle': (
switch (true())
case starts-with(head($m?oldNodes),':stab') return true()
case starts-with(head($m?oldNodes),':rtab') return false()
default return $m?toggle
)
}
},
(: initial input = we start with no new nodes :)
map { 'oldNodes': $in, 'newNodes': (), 'toggle': false() }
)
return $result?newNodes
};
Anyone willing to provide an example of what that would look like in
fn:while-do or fn:do-until?
Thanks!
Graydon
--
Graydon Saunders | graydon...@fastmail.com
Þæs oferéode, ðisses swá mæg.
-- Deor ("That passed, so may this.")
