Re: [xsl] XSLT repetition constructs

["Dimitre Novatchev dnovatchev@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

For people who are interested to know more about the two fold functions:

http://www.cs.nott.ac.uk/~pszgmh/fold.pdf

Cheers,
Dimitre

On Thu, Mar 7, 2019 at 7:28 AM Dimitre Novatchev <dnovatchev@xxxxxxxxx> wrote:
>
> > > I have to confess I always find it difficult to come up with a convincing
> > > use case for fold-right().
> >
> > Symmetricality and karma?
>
> I haven't been engaged with this for some time, but from what I
> remember, foldl() is executed eagerly and can lead to call-stack
> overflow, while foldr() allows lazy evaluation and thus doesn't lead
> to stack overflow. This is why in FP (Haskell) using foldr() is
> generally preferred to using foldl()
>
> Also, if the chain of execution leads to result that would allow
> short-cutting -- as in getting a 0 when computing the product of a
> list of numbers, foldl() will still continue to do the multiplications
> until the whole list is processed, while foldr() produces the result
> immediately.
>
> Must dig for some specific material that discusses this at length.
>
> Cheers,
> Dimitre
>
>
> On Thu, Mar 7, 2019 at 5:23 AM Peter Flynn peter@xxxxxxxxxxx
> <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
> >
> > On 7 March 2019 11:56:10 "Michael Kay mike@xxxxxxxxxxxx"
> > <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
> >
> > > I have to confess I always find it difficult to come up with a convincing
> > > use case for fold-right().
> >
> > Symmetricality and karma?
> >
> > P
> >
> > 
>
>
>
> --
> Cheers,
> Dimitre Novatchev
> ---------------------------------------
> Truly great madness cannot be achieved without significant intelligence.
> ---------------------------------------
> To invent, you need a good imagination and a pile of junk
> -------------------------------------
> Never fight an inanimate object
> -------------------------------------
> To avoid situations in which you might make mistakes may be the
> biggest mistake of all
> ------------------------------------
> Quality means doing it right when no one is looking.
> -------------------------------------
> You've achieved success in your field when you don't know whether what
> you're doing is work or play
> -------------------------------------
> To achieve the impossible dream, try going to sleep.
> -------------------------------------
> Facts do not cease to exist because they are ignored.
> -------------------------------------
> Typing monkeys will write all Shakespeare's works in 200yrs.Will they
> write all patents, too? :)
> -------------------------------------
> Sanity is madness put to good use.
> -------------------------------------
> I finally figured out the only reason to be alive is to enjoy it.



-- 
Cheers,
Dimitre Novatchev
---------------------------------------
Truly great madness cannot be achieved without significant intelligence.
---------------------------------------
To invent, you need a good imagination and a pile of junk
-------------------------------------
Never fight an inanimate object
-------------------------------------
To avoid situations in which you might make mistakes may be the
biggest mistake of all
------------------------------------
Quality means doing it right when no one is looking.
-------------------------------------
You've achieved success in your field when you don't know whether what
you're doing is work or play
-------------------------------------
To achieve the impossible dream, try going to sleep.
-------------------------------------
Facts do not cease to exist because they are ignored.
-------------------------------------
Typing monkeys will write all Shakespeare's works in 200yrs.Will they
write all patents, too? :)
-------------------------------------
Sanity is madness put to good use.
-------------------------------------
I finally figured out the only reason to be alive is to enjoy it.