From: James Gray <james@...>
Date: 2009-04-19T23:21:00+09:00
Subject: Re: [ANN] Junctions for Ruby1.9 (Lab419::functional-0.1.2)

On Apr 18, 2009, at 4:38 PM, Denis Defreyne wrote:

> On Apr 17, 2009, at 11:17 PM, Robert Dober wrote:
>
>> E.g.
>>
>>  any(1, 2, 3) > 2     --> true
>>  [ 1, 3, 5 ].all.odd? --> true
>>  none( 1 ).zero?      --> true
>>  all() == nil         --> true
>>  any() == nil         --> false
>
> The examples you gave are equivalent to

> 	![ 1 ].any? { |e| e.zero? }

Or:

   not [1].include? 0

> 	[].all? { |e| e == nil }

Or:

a = []
a.nitems == a.size

> 	[].any? { |e| e == nil }

Or:

a.nitems > 0

Ruby 1.9's Enumerable#none?() and Enumerable#one?() also help out with  
tests like this.

James Edward Gray II