[REBOL] copy with object words and values
From: greggirwin::starband::net at: 13-Sep-2001 13:36
Ingo Hohmann wrote a couple nifty functions for retrieving the words and
values from an object. In his routines, he uses copy when returning the
data.
; Ingo Hohmann
values-of: func [
"Returns block of object word values next to self directive"
object[object!] "Object words of which its values should be returned"
][
copy next second object
]
Q. Should I even bother worrying about efficiency? Should I just use copy,
as Ingo does, to be on the safe side or can I safely return the data without
using copy? I played around a bit and it doesn't appear that the object data
is at risk of modification, via the result, even without copy. I'm very
likely missing something though.
Q. If there is a difference, and I add a /copy refinement to the routine, is
there a way to "inline" copy so I don't have to have two separate blocks
that are identical except for the copy call?
; Gregg Irwin
values-of: func [
"Returns block of object word values next to self directive"
object[object!] "Object words of which its values should be returned"
/copy "Use the copy refinement if you want a copy of the data"
][
either copy [copy next second object][next second object]
]
Thanks!
--Gregg
