From: Christian Boos <cboos@...>
Date: 2002-08-14T17:23:36+09:00
Subject: RE: Is this array operation correct?



> -----Original Message-----
> From: dblack@candle.superlink.net [mailto:dblack@candle.superlink.net]
> Sent: Wednesday, August 14, 2002 4:39 AM
> To: ruby-talk ML
> Subject: Re: Is this array operation correct?
>
>
> Hello --
>
> On Wed, 14 Aug 2002, Maur�cio wrote:
>
> > Hi,
> >
> >     I've tried this:
> >
> > a = Array.new(3,[]) => [[], [], []]
> > a[1].push(3) => [[3],[3],[3]]
> >
> >
...
>
> It's as if you said:
>
>   ar = []
>   a = [ ar, ar, ar ]
>   ar.push(3)
>
> and then 'a' would look like: [[3],[3],[3]]
>
> >

Then, do something like:

 Array.new(3).map { [] }

Is there something shorter/more efficient?

-- Christian