NAME

  prototype.rb

URIS

  http://codeforpeople.com/lib/ruby/
  http://rubyforge.org/projects/codeforpeople/

SYNOPSIS

  prototype.rb implements the prototype design pattern

    http://en.wikipedia.org/wiki/Prototype-based_programming

  for ruby

WHY

  prototype based programming can look very nice ;-)

EXAMPLES

  __________________________________________
  ~ > cat samples/a.rb
  __________________________________________
  require 'prototype'

  singleton = Prototype.new{
    @a, @b = 40, 2

    def answer() @a + @b end
  }

  p singleton.answer


  __________________________________________
  ~ > ruby samples/a.rb
  __________________________________________
  42



  __________________________________________
  ~ > cat samples/b.rb
  __________________________________________
  require 'prototype'

  DB = Prototype.new{
    host 'localhost'
    port 4242

    def connect() p [host, port] end
  }

  p DB
  p DB.host
  p DB.port
  DB.connect


  __________________________________________
  ~ > ruby samples/b.rb
  __________________________________________
  "localhost"
  4242
  ["localhost", 4242]



  __________________________________________
  ~ > cat samples/e.rb
  __________________________________________
  require 'prototype'

  proto = prototype{
    @a = 40
    @b = 2
  }

  p(proto.a + proto.b)


  ~ > ruby -Ilib samples/e.rb
  42



  __________________________________________
  ~ > cat samples/f.rb
  __________________________________________
  require 'prototype'

  a = prototype{ attributes 'a' => 4, 'b' => 10, 'c' => 2 }

  b = prototype{ a 4; b 10; c 2 }

  c = prototype{ @a, @b, @c = 4, 10, 2 }

  [a, b, c].each{|obj| p(obj.a * obj.b + obj.c) }


  ~ > ruby -Ilib samples/f.rb
  42
  42
  42



  __________________________________________
  ~ > cat samples/g.rb
  __________________________________________
  require 'prototype'

  a = prototype

  b = prototype(a){ @a, @b, @c = 4, 10, 2 }

  a.extend{ def answer() a * b + c end }

  p b.answer


  ~ > ruby -Ilib samples/g.rb
  42

  

DOCS

  see

    lib/*rb
    samples/*rb