Declaring instance variables iterating over a hash!

Question

i want to do the following:

I want to declare the instance variables of a class iterating over a dictionary.

Let's assume that i have this hash

hash = {"key1" => "value1","key2" => "value2","key3" => "value3"}

and i want to have each key as instance variable of a class. I want to know if i could declare the variables iterating over that hash. Something like this:

class MyClass
  def initialize()
    hash = {"key1" => "value1","key2" => "value2","key3" => "value3"}
    hash.each do |k,v|
      @k = v
    end
  end
end

I know this doesn't work! I only put this piece of code to see if you could understand what i want more clearly.

Thanks!

Answer 1

class MyClass
  def initialize()
    hash = {"key1" => "value1","key2" => "value2","key3" => "value3"}
    hash.each do |k,v|
      instance_variable_set("@#{k}",v)
      # if you want accessors:
      eigenclass = class<<self; self; end
      eigenclass.class_eval do
        attr_accessor k
      end
    end
  end
end

The eigenclass is a special class belonging just to a single object, so methods defined there will be instance methods of that object but not belong to other instances of the object's normal class.