From: Marcio Braga <mbraga0001@...>
Date: 2008-08-17T23:53:54+09:00
Subject: Re: Matrix: Need help to understand this behavior

Zacek and all: how to duplicate a matrix that has elements that are also 
matrix ?
For example:

a = [[1]]
b = a.dup
puts a.object_id
puts b.object_id
puts a[0].object_id   # the same object
puts b[0].object_id   # the same object
b[0][0] = 2 * b[0][0]
p a
p b

So, matrix "a" and "b" are different objects but each internal matrix 
element continue to be the same object. Do I need to duplicate each one 
?

Thank you
Marcio
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