Mailing List Archive: 49091 messages
  • Home
  • Script library
  • AltME Archive
  • Mailing list
  • Articles Index
  • Site search

[REBOL] Re: copy with object words and values

From: greggirwin:starband at: 13-Sep-2001 17:05

Hi Ryan, << When writing function "libraries", often it is good to return the original, so as the programmer can decide whether a copy is warranted. On the other hand, the above code represents an instance where you want to use 'copy, reminiscent of copying the contents section from a book and excluding the first heading. >> Good point. I hadn't thought about the callers ability to move back to someplace you maybe don't want them to (e.g. back values-of object). OTOH, you can do back copy values-of object and be OK, so the caller is in control. Hmmm. I'm not worried so much about large objects but multiple hits on small objects. << First you have defined 'Copy to mean something else in the body of your function. No problem though, it just has to be account for by refering to the definition of copy in system/words. >> ACK! Obviously I hadn't tried this code yet.<g> Man, I love the flexibility that REBOL gives me but I'm sure I'll be shooting myself in the foot quite a lot as I work with it. Thanks for catching that. << You probably wont like the "inline" version as much, but here it is: do either copy [get in system/words 'copy][none] next second object >> Yeah, that's kind of ugly.<g> Thanks! --Gregg