From: matz@... (Yukihiro Matsumoto)
Date: 2003-04-08T13:41:17+09:00
Subject: Re: Array Sutraction

Hi,

In message "Re: Array Sutraction"
    on 03/04/08, Jim Freeze <jim@freeze.org> writes:

| I don't have a horse in either the set or bag race.
| It's just the current implementation is very confusing.

I defined array subtraction as

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

which is very clear for me (note that real Array#- uses Hash inside,
so that its comparison is actually done by eql? not ==).

							matz.