Re: Pass by Value does not work

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Re^2: Pass by Value does not work by Bloodnok (Vicar) on Feb 21, 2009 at 12:17 UTC
merlyn, as is his won't, wrote an extremely descriptive & helpful article on this very topic i.e. the problem you've unwittingly encountered, some while ago in the UNIX Review. A user level that continues to overstate my experience :-))	[reply]
Re^2: Pass by Value does not work by swampyankee (Parson) on Feb 21, 2009 at 12:44 UTC
Not to sound too dense, but doesn't Perl always use "pass by reference," in that changing anything in the $@ array will change its values in the calling routine? Of course, the language I grew up using always passes by reference, so it usually takes a mental effort to assume any changes in a sub to passed variables don't propagate upstream. Information about American English usage here and here. Floating point issues? Please read this before posting. — emc	[reply]
Re^3: Pass by Value does not work by almut (Canon) on Feb 21, 2009 at 13:03 UTC
I suppose the OP was thinking that - due to the `@ali = @_` - the entire data structure would be copied... And the "pass by value" was probably referring to `left_triangle(@xx)` vs. `left_triangle(\@xx)` — with the "values" being the array refs. (Only the OP can tell for sure, though, what his/her expectation had been.)	[reply] [d/l] [select]
Re^4: Pass by Value does not work by swampyankee (Parson) on Feb 21, 2009 at 15:01 UTC
Your supposition makes perfect sense to me, and it was something I didn't even think of. Information about American English usage here and here. Floating point issues? Please read this before posting. — emc	[reply]