From: matz@... (Yukihiro Matsumoto)
Date: 2003-02-02T23:28:07+09:00
Subject: Re: operator - on list should be O(n) on sorted lists

Hi,

In message "Re: operator - on list should be O(n) on sorted lists"
    on 03/02/02, Yukihiro Matsumoto <matz@ruby-lang.org> writes:

|The reason is exactly as you guessed.  But your example made me think
|it is overkill for '-' operation (since "-" is not a Set operation).

I mean here is "- can be a non Set operation", i.e. it can be defined
as

  def - (other)
    self.delete_if{|x| other.include?(x)}
  end


							matz.