World: r3wp

yeah, to frustrate newbies

:-) testing with EITHER:

>> either false [1][2]
== 2
>> either true [1][2]
== 1
>> either none [1][2]
== 2

so it doesn't seem to have a reason to return NONE...

a whole lot of things would break if the return value was changed 
from NONE to FALSE. it would be easier to say that ALL is not a really 
true shortcut AND

I suggest we submit a RAMBO and wait to see what Carl says ...

yep

done.

updated the wikibook as well.

Something related that has always bugged me is to-logic:

	>> to-logic 'false
	== true
	>> to-logic "false"
	== true

of what use then is to-logic?

This ?

>> to-logic 1
== true
>> to-logic 0
== false

>> any [false]
== none

>> select [a 1 b 2] 'c
== none

see the pattern? :-)

i agree the help string should probably be clearer.

How do send an email and cc a second email address 
I tried this

lv-header: make system/standard/email [
    to: [test1-:-somehost-:-com]
    cc: [test2-:-gmail-:-com]
]


send/header/subject [test1-:-somehost-:-com] "This is a test" lv-header 
"Test Subject"

but the email gets sent to the to address but not the cc address.

USAGE:

    SEND address message /only /header header-obj /attach files /subject 
    subj /show

DESCRIPTION:
     Send a message to an address (or block of addresses)
     SEND is a function value.

ARGUMENTS:

     address -- An address or block of addresses (Type: email block)

     message -- Text of message. First line is subject. (Type: any)

REFINEMENTS:
     /only -- Send only one message to multiple addresses
     /header -- Supply your own custom header
         header-obj -- The header to use (Type: object)
     /attach -- Attach file, files, or [.. [filename data]]

         files -- The files to attach to the message (Type: file block)
     /subject -- Set the subject of the message
         subj -- The subject line (Type: any)
     /show -- Show all recipients in the TO field

so, I guess


send/only/header  [    [test1-:-somehost-:-com][test2-:-gmail-:-com] ] "This 
is a test" lv-header "Test Subject"

I don't believe that 'send examines the header for cc and bcc fields.

yeah, it doesn't.  check source send

So I have to provide all the addresses as the 2nd parameter ... an 
amalgamation of the To: CC: & BCC addresses .....

no.

you have to rebuild the header for BCC so that the to: address is 
the BCC: address, and the cc: field is none.

since BCC means blind copy - ie the recipient should not get to see 
the cc fields, and the email should be addressed to them.

OK .. this seems to work .... thanks graham.

no problems.

One "poll" question. How many of you are using function with optional 
argument in your scripts and how much would you miss this feature?

Another "poll". What would you say to this:

what do you mean by function with an "optional argument? do you mean 
refinement?

+-: :negate
+- 6 ; == -6
+- -6 ; == 6

Function with optional argument: we can say either:
    list-dir %.
or
    list-dir

Weren't optional arguments problem in rebol? Wasn't it said to compliacte 
it language parser? I can live without them so far ... but ask those 
who code in rebol intensively ...

I just use refinements, if I want optional arguments... but I rarely 
use them

Ladislav, I've programmed an UNIX-like cd function with optional 
argument, but that's about it.

aha, but you are using it in the console rather than in sripts, aren't 
you?

yes

its handy for console and i like it there. in programs its more a 
problem.

thanks

Ladislav - why are you asking?

just to find out which way of handling UNSET! looks optimal

the NEGATE case: for me the name looks "ugly", I prefer something 
shorter, like +-

(any better idea?)

Nope, I think your +- is fine and short.

why the need for short function names?  Rebol is a symbolic language, 
so why not use more symbols ? :)

I have a question about the order of arguments to a function. I wanna 
hear your opinion. I'm programming REBOL versions of some of the 
Amiga graphics.library functions. BltMaskRGBMap is a function of 
mine, that will copy part of an image at a certain position and size 
to another image through a mask. It takes the arguments: source image, 
source position, destination image, destination position, size and 
finally mask. That would be the order of the arguments, if it was 
an Amiga graphics.library function. But in REBOL, destination is 
often (always?) first, so maybe I should switch source image and 
position with destination image and position? What do you think would 
be the better way for a REBOL programmer?

Graham, :-) readability maybe?

Well, I can't recall the last time I needed to negate something.

Better to have something expressive like 'negate than obscure symbol 
combinations.

Remember that Rebol is meant to be read like english.

memory copy operations are always source -> destination.

I use negate several places in Canvas, e.g. to calculate the angle 
of an ellipse:

canvas/effect/draw/2: negate arccosine ((u/x * v/x) + (u/y * v/y)) 
/ divisor

that does not +- my argument.