From: Daniel Lucraft <dan@...>
Date: 2008-01-03T20:35:55+09:00
Subject: Re: has any one tried this?

Wu Ning wrote:
> My ruby version is 1.8.6
> a = Array.new(3,Array.new())
> a[2]<<1
> puts a
> 
> the result of a is
> [[1], [1], [1]]
> in irb..
> 
> I don't understand why.
> I just wannt insert into a 1 into the third array of a.

After a = Array.new(3,Array.new()), a is an array containing three 
references to the same object. There is only one array, but it is 
repeated three times.

Do
a = []; 3.times { a << [] }
and you'll have three different arrays.

best,
Dan
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