From: Friedrich Dominicus <just-for-news-frido@...>
Date: 2006-11-09T00:50:06+09:00
Subject: Suprise in Ruby

I can not remember having read about it before, however the following
happens here:

irb(main):015:0> arr = Array.new(3, Array.new)
[[], [], []]
irb(main):016:0> arr[0].push(1)
[1]
irb(main):017:0> arr
[[1], [1], [1]]

ruby 1.8.5 

but
irb(main):018:0> arr1 = Array.new(3)
[nil, nil, nil]
irb(main):019:0> 0.upto(2) {|i| arr1[i] = Array.new}
0
irb(main):020:0> arr1
[[], [], []]
irb(main):021:0> arr1[0].push(1)
[1]
irb(main):022:0> arr1
[[1], [], []]

I'm not getting it. Is it supposed to work that way?

Regards
Friedrich

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