• Stars
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    63
  • Rank 484,938 (Top 10 %)
  • Language
    Ruby
  • Created over 12 years ago
  • Updated about 11 years ago

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Repository Details

Ruby method decorators inspired by Python.

Ruby Decorators

Ruby method decorators inspired by Python.

I wrote this as a small practice for some ruby meta-programming fun. The implementation is relatively simple, and is thread safe.

There are also these other two implementations:

Installation

Add this line to your application's Gemfile:

gem 'ruby_decorators'

And then execute:

$ bundle

Or install it yourself as:

$ gem install ruby_decorators

Usage

class Hi < RubyDecorator
  def call(this, *args, &blk)
    this.call(*args, &blk).sub('hello', 'hi')
  end
end

class Batman < RubyDecorator
  def call(this, *args, &blk)
    this.call(*args, &blk).sub('world', 'batman')
  end
end

class Catwoman < RubyDecorator
  def initialize(*args)
    @args = args.any? ? args : ['catwoman']
  end

  def call(this, *args, &blk)
    this.call(*args, &blk).sub('world', @args.join(' '))
  end
end

class World
  extend RubyDecorators

  def initialize
    @greeting = 'hello world'
  end

  def hello_world
    @greeting
  end

  +Batman
  def hello_batman
    @greeting
  end

  +Hi
  +Catwoman
  def hello_catwoman
    @greeting
  end

  +Catwoman.new('super', 'catwoman')
  def hello_super_catwoman
    @greeting
  end
end

world = World.new

world.hello_world          # => "hello world"
world.hello_batman         # => "hello batman"
world.hello_catwoman       # => "hi catwoman"
world.hello_super_catwoman # => "hello super catwoman"

License

Copyright (c) 2012 Fred Wu

Licensed under the MIT license.

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