World: r3wp

So far I've push'ed and pop'ed stacks (blocks) at the bottom, because 
I presure, it's faster that from the top (because of memory allocation)

 -- Yes. For block! values that is very true. For list! values it 
 isn't. For blocks it's a zillion times faster...well, for small blocks 
 it's faster and for big ones it's a *lot* faster. If you're making 
 a million changes to a 10,000 item block, it's a big difference.

Q: how can I determine the pointer for a struct!  (or variable)  
for passing this pointer  to a external dll ?

or better explained, howto create a pointer. is there something like 
to-pointer ?

if you pass the struct, a pointer is automatically passed. anyway, 
Ladislav has functions to get pointers to memory. I don't have the 
link at hand though...

you need a pointer to Ladislav's URL struct!    ;-)

took a while to find this ... http://www.fm.vslib.cz/~ladislav/rebol/

not sure that Gab's reference is there, but tons of goodies there...wow!

http://www.compkarori.com/vanilla/display/peek_and_poke.r

anyone recall offhand what the function is that decodes url encoded 
text back to normal?

decode-url

that takes a url

I'm just looking for the function that decodes the text and returns 
text, and not an object

it's likely to be called by decode-url

there is a parse-url  but it is burried in an objecr and not public/global

yeah, it's in there somewhere

see ?? decode-url

dehex?  (preceded by replace/all text "+" " ")

dehex looks good :)

Remember & < and > if you have any of those in the text. 
Shall be replaced by &, < and >.

graham there is a  web-to-plain.r  at http://www.cs.uoregon.edu/~tomc/
that may work for you

if you have more char enties than just hex encoding

there were some note on it in Core release notes IIRC, de-hex and 
decode-url

the microwebserver at http://www.rebol.org/cgi-bin/cgiwrap/rebol/view-script.r?script=webserver.r
doesn't decode spaces etc so comes a cropper if the file on disk 
has a space in it.

The authors, not mentioned, were "Tyler Booth" "Jeff Kreis" "Bohdan 
Lechnowsky"

http://www.rebol.com/docs/changes.htmlnot so much on decode-url, 
but decode-cgi yes.

how to: create a array of objects ? (like arrays of udt's)

blk: copy []
loop 10 [append blk make object!  [a: 1]]

wow, fast reply. thx sunanda. last question: what syntax I need to 
access e.g.  object array no. 5 or 8  to write values like  blk/a: 
recordset ?

I have a object with - name, street, and country and a database with 
50 records. I would like to store the records into a dynamic object 
array for later reading...

equivalent to above, but a bit faster in execution (maybe you have 
a large block):

blk: make block! 10

loop 10 [insert tail blk make object! [name: copy "<name>"]] ; COPY 
so all objects don't share the same string

objects: copy []
person: context [name: copy "<name>" address: copy "<address>"]

get-record-item: func [n field][copy ""] ; <--- you have to make 
this function look into the database

repeat n 50 [append objects make person [name: get-record-item n 
'name address: get-record-item n 'address]]

thank you anton. this is the code I was looking for :-))

oups, how do I read (after appending) record no. 45 ?   person/name 
 (45) ?

objects/45/name

record-num: 45
objects/:record-num/name
;== "aristotle"

That is putting a GET-WORD! in the path. (eg.  :record-num   )

yes, that's it ! running smoth and fast... thank you very much anton.

no problem at all.

;Isn't this a bug?
>> parse #{000102} [#"^@" #"^A" #"^B"]
== false
>> parse #{000102} ["^@^A^B"]             
== true

>> parse #{000102} [#"^@" #"^A" #"^B"]
== false
>> parse #{000102} ["^@^A^B"]
== true

I think AltMe is escaping some characters... I hope you guys can 
copy it and see the actual problem.

;The problem doesn't seem to exist for printable chars.
>> parse #{313233} [#"1" #"2" #"3"]
== true
>> parse #{313233} ["123"]
== true

;Ah. Never mind I forgot about parse/all
>> parse/all #{000102} [#"^@" #"^A" #"^B"]
== true

is there a way how to "simplify" this? (queue is a list!)

	if any [error? try [tail? queue] tail? queue] [

  queue: head queue ; start at a "meaningful" position in the queue
	]

(I would say it is an implementation quirk)

If queue is a list!, why would [tail? queue] fail ? Can 'queue refer 
to other kind of value than a list! value ?

all [series? queue tail? queue queue: head queue]

>> queue: make list! [1 2]
== make list! [1 2]
>> remove queue
== make list! [2]
>> tail? queue
** Script Error: Out of range or past end
** Near: tail? queue

all [attempt [tail? queue] queue: head queue]