World: r3wp

I meant the words in the path

Well, It's needed when the paths are calculated (forget what I said)

Nice. In R3 you'll need a temporary variable for the copied path 
because REMOVE-EACH returns the count removed instead of the value.

Hah! I never thought of doing it that way. Very cool Steeve.

Is there a faster way to replace the first two charcters in the given 
string by the fifth and sixth character of the same string?
 
>> s: "123456789"
== "123456789"

>> change s copy/part at s 5 2
== "3456789"

>> s
== "563456789"

I suppose using pick and poke is not faster.

or:

s/1: s/5
s/2: s/6

this prevents the copy... 

change/part s at s 5 2

Max, but, unfortunately, it does not do what is needed

ah yes... I thought it applied the range on both sides, but it only 
does so in the source string...

Perhaps 'move should have an option to copy ....

Nothing comes to mind Ladislav. You're going to have to copy in any 
case, correct?

Well, I once thought, that there was a way how to circumvent the 
copy, but it looks to me now, that I was wrong

Henrik's method circumvents the extra copy :)

yes, but it does not look to me like a viable way to replace a CHANGE 
X COPY/PART Y by a cycle of that kind, although I did not measure 
the speed difference, yet

forall s [if find [1 2] index? s [s/1: pick head s ((index? s) + 
4)]]

:)

hm .. anyone has any idea why rebpro on linux says "Set-Net not provided." 
I googled but couldn't find the point why is this.
I tried do-ing prot.r and mezz.r

isn't rebpro just /base package? I mean - without the mezzanines?

yes

you need to include mezz-* functions then

but set-net is defined .. but messages this. And if I 
do %/usr/share/cheyenne/rebol-sdk-276/source/mezz.r
do %/usr/share/cheyenne/rebol-sdk-276/source/prot.r

it's the same

It errors out after the start here ....

do you think I need to do one by one (I tried some combinations I 
found on net but same behaviour)

how do you mean? what error does it show?

Script: "User Preferences" (6-Jan-2009/21:58:59+1:00)
Set-Net not provided.
** Script Error: set-user-name has no value
** Near: set-user-name "Petr Krenzelok"
if (not none? system/view) [
    system/view/screen-face/options: none
]
>>

it apparently tries to do user.r, where I have set-net as a first 
function call. Other SDK kernels don't have such problems ...

aha.. you get set-net not provided also... maybe you call set-user-name 
also in user.r and that produces the error

I will try do-ing all the mezz* files first and see if then it will 
work

what happens to you if you do mezz.r and prot.r before calling set-net?

hm.. what does #include in mezz.r do? is this like preprocessing 
directive and inefective at runtime?

yes, inefective in runtime, but effective when you Encap your app, 
REBOL preprocessor (prebol) uses it ...

http://www.rebol.com/docs/sdkug.html

I tried including many mezz-* also mezz-netset.r but same message

I mean do-ing

I also do-ed all prot-* that were in prot.r with no effect?


does this have something to do with licences?? Because word set-net 
is there but it just messages this. And set-net is in all free versions 
of rebol (and hopefully you can send email from them all along) so 
I am quite confused.

are you doing set-net within user.r or in your script?

in my script (or in command line)

is there a difference .. I haven't ever yet user user.r .. I will 
try.

hm.. petr got the same message in user.r if I understood him correctly.

yes, correct. Just right after the start of the intrepreter ....

other kernels in SDK don't show this behaviour ...

Change/part for the n-th time. Did anybody expect this?

>> tgt: "123456789"
== "123456789"

>> src: at tgt 5
== "56789"

>> change/part tgt src 1
== "23456789"

>> tgt
== "5678923456789"

(R2 and R3 are compatible in this)

sorry, this is OK, actually

nevertheless, to all that think, that copying/collecting is slower 
than moving a character at a time, my result is, that the change 
x copy/part y z expression is about 2.8 times faster on my example 
x y z, than a cycle moving a character at a time.

Yes, the internal native loop inside CHANGE is faster than a loop 
run in mezzanine code, even if the loop function is itself a native.

Just a question: is there a way to let external fuctions (outside 
REBOL) be associated to a rebol word ? Could this fuction access 
REBOL values via some API ?

Yes, Giuseppe, in R2 you have struct!s and routines, in R3 you have 
extensions.

How do you create a face with VID that has a transparent backdrop?