[REBOL] Re: Finding all objects derived from a specific object.
From: anton::wilddsl::net::au at: 1-Nov-2006 21:02
Wayne,
Glad to be of assistence.
Yes, blocks load more directly into rebol. By that I mean
it's easy to write just
[]
which loads as a block!, rather than having to write
make list! []
all over the place.
So your code will be more concise and easier to read when
using blocks. Trust me, we all use blocks 99% of the time.
List!s and block!s have different time characterstics for
each supported operation (insert, remove, etc.).
I can't remember the details, because it's never been an issue
for me, however a quick search on google for:
list block insert remove "constant time" rebol
found me this page:
http://www.rebol.org/cgi-bin/cgiwrap/rebol/ml-display-message.r?m=rmlMFRQ
There have been discussions on this subject in the past, try
rebol.org mail list search some more, should yield more detail.
list! also behaves a bit differently than other series! with regard
to INSERT; Using INSERT moves the list series index to the end of the
inserted data. Which can be confusing, eg:
list: make list! ["b"]
insert list "a"
list
;== make list! ["b"] ; <-- what ?
head list
;== make list! ["a" "b"] ; <-- oh, I see
list: head list ; <-- let's fix it permanently
Compare to block (and other series):
blk: copy ["b"]
insert blk "a"
blk
;== ["a" "b"] ; <-- ok, series index is still at the head
There might be other differences as for INSERT. I don't know, I don't
use list at all.
Regards,
Anton.
