----- Original Message -----
Sent: Monday, September 29, 2003 10:24
AM
Subject: Re: Witango-Talk: Witango 5 and
recursion
ahh i see
thats pretty cool, its like your making your own
stack.
It was nice to meet you too Dave, Scott's talks
on xml and DOM gave me some interesting ideas im now trying to implement
(:
Thank you too John, im going to try out method
scope and see how it works.
Right now i have something kind of working, kind
of not that i slapped together last night but it uses instance scope and
creates a new tcf for each call so thats not too pretty.
Im kind of curious now, what kind of stuff
have you guys had to use recursion for?
----- Original Message -----
Sent: Monday, September 29, 2003 8:11
AM
Subject: RE: Witango-Talk: Witango 5
and recursion
Hi
Alan,
I've written many recursive algorythms and it sounds like you're on
the right track.
The first time you call the method put the results into a local scope
array. On subsequent calls add rows to the array, either at the beginning of
the array or at the end depending on how you want them ordered. A simple IF
tag should do. IF numrows > 0 addRows ELSE assign the
array.
You may also want to add a check to prevent an infinite loop.
<@assign local$level <@calc 'sum(1
@@local$level)'>>
then if local$level > 25 don't call the method again, and throw an
error or build some exception handler to deal with it.
Dave Shelley
PS. It was nice to meet you at the conference.
Heya guys,
I was wondering if there was a way to do
recursion in witango 5?
I have a DOM variable im reading from a file
and trying to show as it's tree structure and using indenting to show it
at its different levels.
I have nodes that are "folders" and nodes
that are "notes", folders can be openned and closed and notes are just
there (like folders and files in an OS) so i need to show all oppened
folders and their contents etc.
what i was thinking so far was have a
tcf function that took a DOM variable and made an array of it's
children. Then it loops through the children and if it hits an open
folder, call the tcf function again with the DOM object of that folder so
it will do the subfolder then when its done continue with the current
folder.
my only problem here is that local variables
will get overwritten when i call the tcf function again inside itself
right?
Method scope would be overwritten too and
instance seems like it might work except id have to make a tcf object for
each call of the function which that would add alot of overhead
right?
I am looking at only 4 or 5 nested levels at
maximum if that helps at all.
Its late so not sure if i explained this very
well but does anyone have any ideas?
Thanks!
Alan
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