World: r3wp

ic.. here's another .. how can i determine if a 'word has been set 
yet, in the code?

>> value? 'xx
== false
>> xx: 1
== 1
>> value? xx
== true

what if i dont want to spin the value?  is there no way to check 
other than trying it?

or wait.. nvm :)

Value? 'xx shouldn't "do" anything with the word being tested-- so 
it should be safe at all times
Or am I missing your point?
>> xx: func [] [print "hello"]
>> value 'xx
>> value? 'xx
== true      -- does not print "hello"

no, I read your post too quickly

I often wonder, why 'while' takes a condition-block, when 'if' doesn't. 
Is there an explanation for that?

of course. The IF condition is evaluated once, while WHILE condition 
may be evaluated many times.

Geomol, if you try to write your implementation of WHILE, you'll 
immediately see the reason. :)

Thanks! :-)

Given that we have a 'read-net func, would a 'write-net equivalent 
make sense? (could then have a [view] 'request-upload func to match 
'request-download)

Did I just found an error with replace? Try these:
>> replace/all "abc{def" "{" "^^{"
== "abc^^{def"
>> replace/all "abc{def" "{" "^{"
== "abc{def"

So I can't get a result with just one ^?

^^^{ ? a "^{" is the same as a "{". To allow {this ^{ is a paren} 
 .

>> replace/all "abc{def" "{" "^^^{"
== "abc^^{def"

Yes thats right. Its molded. "^" is escaped, the escape-char is "^"..

print replace/all "abc{def" "{" "^^^{"

yes, seems right

The result is 8 bytes.

But
s: {this ^{ is a paren}
gives an error: ** Syntax Error: Invalid string

>> s: "this ^{ is a paren"
works ok.

works on 1.2.48.4.2 . what are you using?

1.2.57.3.1

I'm trying to build a string with rebol content inside (also strings). 
And I get into trouble. I think, it's a bug. Try this:
>> s: "^"abc^/def^}ghi^""
== {"abc
def^}ghi"}
>> to-block s
** Syntax Error: Invalid string -- "abc
** Near: (line 1) "abc

This works:
>> s: "^"abc^""
== {"abc"}
>> to-block s
== ["abc"]

so my example above should work too, right?

Looks like to-block isn't noticing the carat:
>> to-block "^{}"
== [""]
>> to-block "^{"
** Syntax Error: Invalid string -- {
** Near: (line 1) {

I don't think, you can have a block with only a '{' inside. REBOL 
will think of it as the start of a string. If you put '{' in between 
"", you don't have to use caret, but you can:
>> to-block "^{^}"
== [""]
>> to-block "{}"
== [""]

I think, my problem start, when I have a newline before a '{':
>> to-block "^"^/{^""
** Syntax Error: Invalid string -- "
** Near: (line 1) "

Because this works:
>> to-block "^"{^""
== ["{"]

I figure, the problem is with strings, not with to-block or any other 
command.

Probably because the caret can be used even in strings and used for 
line termination formatting etc..

I would be ok with reporting this to RAMBO, but would like to be 
sure, it's a bug first. (I don't like too much in RAMBO, if it's 
not a bug anyway.)

Can you give an example of your input and final desired output ?

Input:

Input: "^"^/{^""

That's a string with 4 bytes: A ", then a newline, a { and another 
".
Operation: to-block
Desired output: ["^/{"]

That's a block with a string, that consists of 2 bytes: a newline 
and a {.

If this can be solved, then I can solve my other problems, I think. 
(Same goes with } btw.)

Maybe it's easier to see, if I use binary:
>> b: #{220A7B22}	; That's my input string as binary.
Try these:
>> to-string b
>> to-block b
The last one will fail, but it should give me:
== ["^/{"]

>> s: input
^/{
== {"^^/^{"}
>> to-block s
== ["^/{"]
>> print s
^/{
>> print to-block s

{
>>

Is that what you want?

I guess as soon as you have a newline in your string you should start 
the string with { and not with "

Interesting!

I would just think, that I should write the string like this then:
>> s: {"^/^{"}
but that's not a string for some reason!?

Thanks sqlab. I'll see, if your way can solve my problem, when I 
get home later today.

Why do you think, that this is no string?

>> s: "^/{"
== "^/{"
>> type? s
== string!

It's the molded representation of an internal string

Try it!

You get a new line with { in the beginning. That's REBOL way to tell 
you, you haven't finished your string. Like this:
>> s: {"^/^{"}
{

if I put in a } to finish the string, I get:
{    }
** Syntax Error: Invalid string -- }
** Near: (line 2) }

I see, the problem arises when you type it.

I would initially think, that {"^/^{"} would be a valid string with 
4 chars inside. 2 ", 1 newline and one {, but it isn't.

Did you check if it is the same behaviour when loading from a file?

yes

I have seen different behaviour from typing in the console and loading 
from a file

for example
>> func: [;  []]
** Syntax Error: Missing ] at end-of-script
** Near: (line 1) func: [;  []]
>>