[REBOL] Re: COLLECTing results
From: AJMartin:orcon at: 24-Dec-2003 22:49
Hi, Ladislav.
Thanks for throwing in your two cents. Let's smunch my 'Collect with yours
and pick out the best survivor!
; Ladislav's:
use [insert-only] [
insert-only: func [series value] [insert/only series value]
collect: func [
{Collects block evaluations, use as body in For, Repeat, etc.}
block [block!] "Block to evaluate."
/initial result [series!] "Initialise the result."
/only "Inserts into result using the Only refinement."
] [
result: any [make result result make block! 10]
reduce [
:head pick reduce [
:insert :insert-only
] not only :tail result :do block
]
]
]
; Andrew's (just for Carl... :) ):
>> source collect
collect: func [
"Collects the results of block evaluations."
Block [block!] "The block to 'do."
/Only "Inserts the result as a series."
/Full "Don't ignore none! values."
/Initial Type [series! datatype!] "Specifies the type of the result."
][
use [Break Result Results] [
Break: func [
"Breaks out of the 'Collect."
/Return "Forces the loop function to return a Value."
Value [any-type!]
] [
system/words/break/return either Return [
Value
] [
Results
]
]
Results: any [
all [
datatype? Type
make Type 0
]
Type
copy []
]
compose/deep [
if not any [
unset? set/any 'Result do [(bind Block 'Break)]
(pick [[none? :Result] []] not Full)
] [
(pick [insert insert/only] not Only) tail Results :Result
Results
]
Results
]
]
]
Anyone else want to collide their code into the pile? :)
Andrew J Martin
Breeding the best Rebol code in this hemisphere!
ICQ: 26227169
http://www.rebol.it/Valley/
http://valley.orcon.net.nz/
http://Valley.150m.com/
