From: Bulat Ziganshin <bulatz@...>
Date: 2002-11-28T16:03:31+09:00
Subject: Re: call-by-reference problem again

Hello Shannon,

Wednesday, November 27, 2002, 11:52:59 PM, you wrote:

SF> I encountered the call-by-reference problem, which was discussed
SF> before in this group. Please have a look at the following code:

SF> def test!(str)
SF>   str=str.upcase
SF> end
SF> str="hello"
SF> print str,"\n"
SF> test!(str)
SF> print str,"\n"

 def test!(str)
   str.upcase!
 end
 
SF> The problem here is, we have seen some Ruby methods, like String.chomp!
SF> and many that end with a !, they can modify parameters in place, how is
SF> it done?? Is it possible to do this in programming, or is it only
SF> available in standard libraries, which may be implemented outside of
SF> ruby (eg. in C)?

ruby is not created with ability to modify parameters in mind. so you
must not rely on this programming paradigm. use arrays or multiple
return values or something other


-- 
Best regards,
 Bulat                            mailto:bulatz@integ.ru