From: Rolf Pedersen <rolfhsp@...>
Date: 2010-04-23T22:26:58+09:00
Subject: Re: What is wrong with this few lines of code

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Hi Damjan

The code ar = Array.new(n, []) actually makes n copies of the same object
(empty array), so each time you do either ar[0] << e or ar[1] << e you are
appending elements to the same array.

What I guess you want is to different objects, and you can do that by e.g.
ar = Array.new(2){[]}
(or just ar = [[],[]]   ...or many other ways :o) )

Best regards,
Rolf

On Fri, Apr 23, 2010 at 2:49 PM, Damjan Rems <d_rems@yahoo.com> wrote:

>
> ar = Array.new( 2,[])
> %w(a b).each do |e|
>  ar[0] << e
>  ar[1] << e
> end
> ar.each do |e|
>  e.each {|line| p line}
> end
>
> Returns
> "a"
> "a"
> "b"
> "b"
> "a"
> "a"
> "b"
> "b"
>
> I would expect:
> "a"
> "b"
> "a"
> "b"
>
> by
> TheR
> --
> Posted via http://www.ruby-forum.com/.
>
>

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