From: nobu.nokada@...
Date: 2001-12-30T14:20:04+09:00
Subject: [ruby-talk:29705] Re: Copying an Array

At Sun, 30 Dec 2001 07:57:28 +0900,
Matthew Diephouse <fokke_wulf@hotmail.com> wrote:
> What's the best way to copy an array? All I could could come up with is:
> 
> arrayOne.each do |element|
>  arrayTwo.push(element)
> end

If arrayTwo exists already, to add all elements in arrayOne,

  arrayTwo.concat(arrayOne)

To make a new copy of arrayOne,

  arrayTwo = arrayOne.dup

or

  arrayTwo = [*arrayOne]

Latter doesn't copy instance variables nor taintness.

-- 
Nobu Nakada