[REBOL] Re: REBOL Cookbook in Beta
From: g:santilli:tiscalinet:it at: 3-Sep-2003 10:16
Hi Michael,
On Wednesday, September 3, 2003, 12:06:16 AM, you wrote:
MJM> trying to accomplish. I.e., sort of the difference
MJM> between the following ideas
MJM> a < data | b | c | d | e | f > outfile
MJM> and
MJM> write f(e(d(c(b(a(data))))))
MJM> I prefer the first for clarity, given my experiences
MJM> with the pipe idea.
That's just syntactic sugar; indeed, you can easily make a "pipe"
dialect in REBOL:
>> element: [copy el [word! [to '| | to end]] (push el)]
== [copy el [word! [to '| | to end]] (push el)]
>> pipe-expr: [element any ['| element]]
== [element any ['| element]]
>> result: []
== []
>> push: func [element] [result: compose [(element/1) (result) (next element)]]
>> parse [data | a | b | c | d | e | f] pipe-expr
== true
>> result
== [f e d c b a data]
This allows you to do thing like:
>> clear result
== []
>> parse [copy "REBOL" | append " powerful" | insert "Isn't " | append "? ;-)"] pipe-expr
== true
>> result
== [append insert append copy "REBOL" " powerful" "Isn't " "? ;-)"]
>> do result
== "Isn't REBOL powerful? ;-)"
The above is just very QAD, but it could be easily made useful...
Regards,
Gabriele.
--
Gabriele Santilli <[g--santilli--tiscalinet--it]> -- REBOL Programmer
Amiga Group Italia sez. L'Aquila --- SOON: http://www.rebol.it/
