Re: How do I do this in dsssl/jade?

[Norman Walsh <ndw@xxxxxxxxxx>]

/ "Glenn R. Kronschnabl" <grk@xxxxxxxxxxxxxxxx> was heard to say:
| I have an xml file that looks something like:
[...]
| Q1: I would like to print a phone-book like output, but I can't figure out 
| how to do this in dsssl!  I want something that looks like:
| 
|   * A *
| 
|    name that starts with A from <fn> tag/phone/etc
|    name that starts with A from <fn> tag/phone/etc
[...]
| 
| I have spent the better part of a week trying to figure this out.  I have 
| tried to adapt the update-dict procedure that p. prescod posted some time 
| back (thread was 'List of speakers'), but no success yet.  What's 
| frustrating is that this would be EASY in almost any other language!  Can 
| someone point me in the right direction?  Thanks!
| 
| Q2: Right now I am sorting/reordering via perl-xml, but I assume I could 
| reorder the nodelist using dsssl/jade.  Anyone have some code I peruse?
| 
| (Q1 is more MUCH more important)

Are you saying that all the vcards are already in sorted order? If so,
what you want's not too hard.  Sorting, that would be a different kettle
of fish altogether.

Anyway, here's the sort of thing I'd do if I was starting with the
sorted list...

(define (print-vcards vcardlist)
  ;; print the appropriate letter heading, then print all the cards
  ;; that have names that start with that letter. Repeat until there
  ;; are no more vcards.
  (let loop ((vcs vcardlist))
    (if (node-list-empty? vcs)
        (empty-sosofo)
	(let* ((vcard (node-list-first vcs))
               (fn (select-elements (children vcard) "fn"))
               (letter (substring (data fn) 0 1)))
          (make sequence
            (print-letter letter)
            (loop (print-letter-cards letter vcs)))))))

(define (print-letter-cards letter vcardlist)
  ;; print all the vcards that have names that start with letter,
  ;; then return *the rest of the list*
  (let loop ((vcs vcardlist))
    (if (node-list-empty? vcs)
        (empty-node-list)
	(let* ((vcard (node-list-first vcs))
               (fn (select-elements (children vcard) "fn"))
               (fnl (substring (data fn) 0 1)))
          (if (equal? fnl letter)
            (make sequence
              (print-card vcard)
              (loop (node-list-rest vcs)))
	    (node-list-rest vcs))))))

Or something like that.

                                        Cheers,
                                          norm
-- 
Norman Walsh <ndw@xxxxxxxxxx>      | Every day is a good day.--Yun-men
http://nwalsh.com/                 | 


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