[REBOL] Re: reduce/deep
From: robert:muench:robertmuench at: 22-Oct-2003 20:17
On Tue, 21 Oct 2003 22:33:11 +0200, Ingo Hohmann <[ingo--2b1--de]> wrote:
> But it _works_ those two blocks are not the same ...
>
> >> append d 1
> == [[a 1 b 2] [a 1 b 2] 1]
> >> e
> == [[a 1 b 2] [a 1 b 2]]
Hi, hmmm... the help for reduce reads:
Evaluates an expression or block expressions and returns the result.
This means that reduce [...] will create a new block, which is the
container for the result. Even the experssions inside the block don't give
you a hint, that a new block is created. 'same? takes the (new created)
cotainer block into account as well.
> on the other hand ...
>
> >> same? d/1 e/1
> == true
> >> append d/1 1
> == [a 1 b 2 1]
> >> d
> == [[a 1 b 2 1] [a 1 b 2] 1]
> >> e
> == [[a 1 b 2 1] [a 1 b 2]]
If we only had a script that would plot a graph of such relations... BTW:
Do we have an inverse 'same? perhaps 'like-me? which lists all words where
foreach hit like-me? me [(true = same? me hit) = true]
always holds?
--
Robert M. Münch
Management & IT Freelancer
Mobile: +49 (177) 245 2802
http://www.robertmuench.de
