From: Robert Dober <robert.dober@...>
Date: 2009-04-18T06:17:23+09:00
Subject: [ANN] Junctions for Ruby1.9 (Lab419::functional-0.1.2)

Hi list

Lab419::functional contains an implementation of Perl6's junctions now

http://rubyforge.org/frs/?group_id=3824&release_id=33503

Enjoy

Junctions

A pure Ruby implementation of Junctions as planned for Perl6. [1]

Junctions are composite expressions that reply to methods as would
their elements.
E.g.

   any(1, 2, 3) > 2     --> true
   [ 1, 3, 5 ].all.odd? --> true
   none( 1 ).zero?      --> true
   all() == nil         --> true
   any() == nil         --> false

A popular use case is
   if any( "--help", "-?", "-h" ) == param then
     usage

Junctions can be constructed by either
  * using the module methods any, all, none and one of Lab419::Junctions
or
  * by using junction methods of enumerables  (1..3).all > 0
or
  * by including Lab419::Junctions

For details please see the references below.


[1] http://en.wikipedia.org/wiki/Perl_6#Junctions
    http://search.cpan.org/dist/Perl6-Junction/lib/Perl6/Junction.pm
    http://www.perl.com/pub/a/2003/07/29/exegesis6.html?page=4
    http://www.programmersheaven.com/2/Perl6-FAQ-Junctions