How can one set property values when initializing an object in Ruby?

Question

Given the following class:

class Test
  attr_accessor :name
end

When I create the object, I want to do the following:

t = Test         


        

Answer 1

You could do this.

class Test
   def not_called_initialize(but_act_like_one)
        but_act_like_one.each_pair do |variable,value|
            instance_variable_set('@' + variable.to_s, value)
            class << self
                    self
            end.class_eval do
                    attr_accessor variable
            end
        end
   end
end

(t = Test.new).not_called_initialize :name => "Ashish", :age => 33
puts t.name #=> Ashish
puts t.age  #=> 33

One advantage is that you don't even have to define your instance variables upfront using attr_accessor. You could pass all the instance variables you need through not_called_initialize method and let it create them besides defining the getters and setters.