From: Chris Shea <cmshea@...>
Date: 2008-08-13T04:47:32+09:00
Subject: Re: How do I unsplat something?

On Aug 12, 1:14 pm, Patrick Li <patrickli_2...@hotmail.com> wrote:
> I can't use Array() because I want:
> {"a"=>2} to become [{"a"=>2}]
>
> so far: flatten is the best so far... except that it recursively
> flattens inner arrays too... which is not ideal but workable for my
> current use.
>
> --
> Posted viahttp://www.ruby-forum.com/.

There was a ruby quiz that included implementations of a single-level
flatten[1]. Taking from James Gray's solution[2], and minding your
requirements regarding hashes, what about this:

def unsplat(the_splatted)
  if the_splatted.kind_of?(Hash)
    [the_splatted]
  else
    [the_splatted].inject(Array.new) { |arr, a| arr.push(*a) }
  end
end

unsplat(1)          # => [1]
unsplat([2,3])      # => [2, 3]
unsplat([4,[5,6]])  # => [4, [5, 6]]
unsplat({'a'=>2})   # => [{"a"=>2}]

HTH,
Chris

[1] http://www.rubyquiz.com/quiz113.html
[2] http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/238693