From: ts <decoux@...>
Date: 2003-03-24T02:24:54+09:00
Subject: Re: Question about behavior of Array.new

>>>>> "J" == Jeremy  <thinker5555@yahoo.com> writes:

J> I found out at this point, and with a bit of searching in the ruby.lang
J> archives, that this winds up creating an array with nine references to the
J> same object.  So, now knowing that this happens, I can deal with it, but
J> what I want to know is WHY it's like this.

 How do you create these 9 objects from one object ?

 and don't reply #dup because in some special case it can be
 inappropriated :-) 

 1.8 has a new syntax where Array::new accept a block to do what you want 

pigeon% ruby -ve 'p Array.new(2) { Object.new }'
ruby 1.8.0 (2003-03-23) [i686-linux]
[#<Object:0x401ac424>, #<Object:0x401ac410>]
pigeon% 

 *warning* it don't work with 1.6.8

pigeon% /usr/bin/ruby -ve 'p Array.new(2) { Object.new }'
ruby 1.6.8 (2002-12-24) [i686-linux]
[nil, nil]
pigeon% 



Guy Decoux