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[REBOL] Argument passing

From: al::bri::xtra::co::nz at: 6-Apr-2001 17:22

I got this message directly and thought it might be of benefit to others as well.
> ...I couldn't help noticing the obvious demonstration of your REBOL skills
on userlist and wondered if you had any suggestions for a simple but puzzling problem. I say puzzling because in any other programming/scripting language it's not difficult to resolve.
> The question is - How does one pass a dynamic list of arguments to a > REBOL script invoked from: > a) the rebol command line > b) a DOS batch file > c) a Unix shell script? > > I've checked the user lists but to no avail. They either have interactive
prompts or do not parse the arguments from the command line.
> My objective is to run a REBOL script which takes a dynamic list of
arguments and constructs an http CGI request. E.g
> (executed at DOS command-line or batch file, but equally possible from
Unix shell or script)
> c:\>c:\rebol\rebol.exe c:\rebol\scripts\query.r "1234 green rubber ball" > > The idea is that query.r parses the arguments "1234 green rubber ball" and
forms up and executes a REBOL command string like:
> print read =rubber&text3=ball
> (textn.....textn+1 is the dynamic bit) > > I'd be very grateful for any suggestions you might have. >From the Rebol Core manual (It's available on Rebol HQ site in PDF format
IIRC ), page 127, 4 - 7: system/script/args should have "the arguments to the script". And:
>> help do
USAGE: DO value /args arg /next DESCRIPTION: Evaluates a block, file, URL, function, word, or any other value. DO is a native value. ARGUMENTS: value -- Normally a file name, URL, or block (Type: any) REFINEMENTS: /args -- If value is a script, this will set its system/script/args arg -- Args passed to a script. Normally a string. (Type: any) /next -- Do next expression only. Return block with result and new position. So: do/args %/c/rebol/scripts/query.r "1234 green rubber ball" should do case A. And, inside %query.r: probe system/script/args should print: "1234 green rubber ball" Then it should be a simple matter to write:
>> b: parse "1234 green rubber ball" none
== ["1234" "green" "rubber" "ball"] to obain the individual words, and then iterate through them with with a 'foreach. I hope that helps! Andrew Martin ICQ: 26227169