From: Dave Baldwin <dave.baldwin@3dlabs.com>
Date: 2005-04-25T21:46:02+09:00
Subject: Re: Array::new


On 25 Apr 2005, at 13:36, Jamie Hodkinson wrote:

> Just had something unexpected - is this the correct behaviour?
>
> foo = Array.new(3,Array.new)
> foo[0] << 4
> foo[1] << 5
> foo[0] << 6
> p foo
>
> outputs...
>
> [[4, 5, 6], [4, 5, 6], [4, 5, 6]]
>
> I realise what's happening here, and might have expected it if the
> first line was
> foo = Array.new(3,[])
>
> I'm left with doing this:
> foo = (1..3).collect { [] }
>
> which doesn't exactly raise my heartbeat. Any other options?
>

foo = Array.new(3){Array.new}

gives you what you want.

Dave.

> Cheers
>
> Jamie
>