Class: Module

Inherits:
Object
  • Object
show all
Defined in:
lib/array_attribute.rb

Overview

Array atrribute accessor helper.

This helper creates two methods to classes.

array_attribute and carray_attribute.

With these you can create methods that encapsulate an array property if you have never used or accessed the property it will have an empty array as a default value.

<code>

class Developer
  carray_attribute :fingers
  array_attribute :tickets, :hot_chicks
end

developer = Developer.new

puts developer.tickets.inspect

developer.tickets << 1
developer.tickets << 2
developer.tickets << 3
puts developer.tickets.inspect

developer.tickets.pop
developer.tickets.pop
puts developer.tickets.inspect

developer.tickets.pop
puts developer.tickets.inspect

puts developer.hot_chicks.inspect

developer.hot_chicks << 1
developer.hot_chicks << 2
developer.hot_chicks << 3
puts developer.hot_chicks.inspect

puts Developer.fingers.inspect 

(1..10).to_a.each do |finger|
  Developer.fingers << finger
end

puts Developer.fingers.inspect

<code>

Instance Method Summary collapse

Instance Method Details

#array_attribute(*names) ⇒ Object

Instance level attribute accessor helper generator.



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# File 'lib/array_attribute.rb', line 53

def array_attribute(*names)
  names.each do |name|
    self.send(:define_method, name) do
      unless instance_variable_get("@#{name}")
        instance_variable_set("@#{name}", [])
      end
      instance_variable_get("@#{name}")
    end
  end
end

#carray_attribute(*names) ⇒ Object

Class level attribute accessor helper generator.



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# File 'lib/array_attribute.rb', line 65

def carray_attribute(*names)
  names.each do |name|
    self.class.send(:define_method, name) do
      unless instance_variable_get("@#{name}")
        instance_variable_set("@#{name}", [])
      end
      instance_variable_get("@#{name}")
    end
  end
end