World: r3wp

about Roberts stack: most of that is inbuild in series, so why wrap/rename 
it?

Thats something Carl blogged about: Idioms http://www.rebol.net/article/0101.html
would be:
push -> insert stack value
pop -> remove stack ; does not return the value. 

top -> stack/1 ; with path, the if empty? stack[return none] is implicit

POP is about the most useful method that isn't built into REBOL. 
It's nice to be able to remove something and have it returned, rather 
than having the series returned.

my push/pop has the advantage that it pushs/pops a group of variables, 
instead of single values. sometimes handy with recursive parsing.

(and 'pop knows which variables where pushed, so just "pop", not 
"pop[a b]")

pop: partly agreed. but i use the top of stack directly, and poping 
really means "no longer needed.
i don't use   push var  change var   pop var
but   push value   use stack/1   pop

Is there someway to have a function stored as a string, and then 
do it, without triggering the actual function name? ie:

N: {o: func [inpu][print join inpu "ing"]}

so that i get.. 

do N "test"
>> testing

do do N "test"

hehe, thanks

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). 
But I haven't actually tested it, and if it's true in all cases. 
Does anyone have experience with that?

boo-boo: func [inpu][if error? try inpu [print "error"]]
boo-boo [do do N "test"]

Looking at 'ALTER.. shouldn't there be a similar word that "If a 
value is not found in a series, append it; otherwise, DO NOTHING?

In other words.. i want to check the series to see if the word exists.. 
if not, add it..

Seems this should be an argument for 'ALTER

addWord: func [ser wrd][if not find ser wrd [append ser wrd]]

unioning your test word with your block of words may work

color: [ red blue green]
== [red blue green]

>> color: union color [red]
== [red blue green]
>> color: union color [yellow]
== [red blue green yellow]
>>

stack: Gregg, yes these are true words about using the same name. 
But let's face reality, those data-structure stuff is quite old and 
is learned at university. Most programmers are used to them. And 
from the name of the functions I can implie to the datastructure 
used. Someone not common with Rebol might not "see" that this simulates 
a stack.

You need to know the common sense data-structures anyway. But to 
be honest, the code is quite dated. I use it in MDP to handle the 
parsing state.

anyone know what causes an error 

** user error: system error: tcp

make error! "system error: tcp"

maybe?

no .. not in this instance.

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 ?