From: TAKAHASHI Masayoshi <maki@...>
Date: 2001-04-28T12:00:58+09:00
Subject: [ruby-talk:14363] Re: RCR: Array#insert

Hi,

Michael Neumann <neumann@s-direktnet.de> wrote:
> class Array
>   def insert(inx, obj)
>     self[inx, 0] = obj
>     self
>   end
> end

Another candidate is:

class Array
  def insert(num, elem)
    if elem.kind_of? Array
      self[num, 0] = [elem]
    else
      self[num, 0] = elem
    end
    self
  end
end

a=[1,2,3,4,5,6]
a.insert(0,"a")
p a  # => ["a", 1, 2, 3, 4, 5, 6]
a.insert(3,"b")
p a  # => ["a", 1, 2, "b", 3, 4, 5, 6]
a.insert(5,[1,2,3])
p a  # => ["a", 1, 2, "b", 3, [1, 2, 3], 4, 5, 6]

TAKAHASHI Masayoshi   E-mail: maki@open-news.com