From: matz@... (Yukihiro Matsumoto)
Date: 2001-06-19T11:33:58+09:00
Subject: [ruby-talk:16615] Re: RCR: Enumerable: every() and none()

Hi,

In message "[ruby-talk:16591] RCR: Enumerable: every() and none()"
    on 01/06/19, Hugh Sasse Staff Elec Eng <hgs@dmu.ac.uk> writes:

|Enumerable should have functions every and none to complement find_all
|and reject.  I think it is likely that people will want to know if all
|the things in the enumObj match or all don't match the conditions
|specified by block. So:
|
|def every(&block)
|    find_all(&block) == to_a()
|end
|
|def none(&block)
|    reject(&block) == to_a()
|end

In 1.7, we have "Enumerable#all?" and "Enumerable#any?".

  [1,2,3].all?{|x| > 0}           # true
  [1,2,3].any?{|x| == 2}          # true

							matz.