[REBOL] Hidden object values? Re:(2)
This is a very cool technique. Is it documented, or are we in the realm of "oral tradition"? -- Tim Lesher [EMAIL PROTECTED] -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Friday, June 16, 2000 17:21 To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Subject: [REBOL] Hidden object values? Re: Tim Lesher: > Some of the Rebol documentation mentions "hidden" object values, and says to see the Rebol user's guide for more information. However, looking at the /core user's guide (2.2.0), I can't find any mention of how to make a hidden object value. Is this possible, and if so, how? Here's some stuff you might not know about objects: >> o: make object! [ [A: 1 [B: 2 [C: 3 [] >> first o == [self A B C] >> second o == [ make object! [ A: 1 B: 2 C: 3 ] 1 2 3] By using 'first and 'second, you can access parts of the object. For hiding stuff in objects, you can use a technique like this: >> oh/f ** Script Error: Invalid path value: f. ** Where: oh/f >> oh: make object! [ [F: none [use [A B] [ [A: "" [B: "" [set 'F func [] [print [A B]] [] [] >> probe oh make object! [ F: func [][print [A B]] ] >> oh/f BUT! The first use of 'recycle (or allowing the Rebol Garbage Collector to function) and then issuing: >> oh/f crashes Rebol. Which is annoying. :-( Andrew Martin Environmentally sound Rebol... ICQ: 26227169 http://members.xoom.com/AndrewMartin/ -><-
[REBOL] Hidden object values? Re:
> Here's some stuff you might not know about objects: > >> o: make object! [ > [ A: 1 > [ B: 2 > [ C: 3 > [ ] > >> first o > == [self A B C] > >> second o > == [ > make object! [ > A: 1 > B: 2 > C: 3 > ] 1 2 3] > By using 'first and 'second, you can access parts of the object. Can I rely on this not changing? Is this a stable part of rebol?
[REBOL] Hidden object values? Re:
Tim Lesher: > Some of the Rebol documentation mentions "hidden" object values, and says to see the Rebol user's guide for more information. However, looking at the /core user's guide (2.2.0), I can't find any mention of how to make a hidden object value. Is this possible, and if so, how? Here's some stuff you might not know about objects: >> o: make object! [ [A: 1 [B: 2 [C: 3 [] >> first o == [self A B C] >> second o == [ make object! [ A: 1 B: 2 C: 3 ] 1 2 3] By using 'first and 'second, you can access parts of the object. For hiding stuff in objects, you can use a technique like this: >> oh/f ** Script Error: Invalid path value: f. ** Where: oh/f >> oh: make object! [ [F: none [use [A B] [ [A: "" [B: "" [set 'F func [] [print [A B]] [] [] >> probe oh make object! [ F: func [][print [A B]] ] >> oh/f BUT! The first use of 'recycle (or allowing the Rebol Garbage Collector to function) and then issuing: >> oh/f crashes Rebol. Which is annoying. :-( Andrew Martin Environmentally sound Rebol... ICQ: 26227169 http://members.xoom.com/AndrewMartin/ -><-
