Method: Object#replace

Defined in:
lib/core/facets/object/replace.rb

#replace(source) ⇒ Object

Replace state of object with the state of another object of the same class (or superclass).

class ReplaceExample
  attr_reader :a, :b
  def initialize(a,b)
    @a, @b = a, b
  end
end

obj1 = ReplaceExample.new(1,2)
obj1.a  #=> 1
obj1.b  #=> 2

obj2 = ReplaceExample.new(3,4)
obj2.a  #=> 3
obj2.b  #=> 4

obj1.replace(obj2)
obj1.a  #=> 3
obj1.b  #=> 4

This is very similar to instance.update, but it is limited by the class of objects, in the same manner as Array#replace.

Raises:

  • (ArgumentError) 


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# File 'lib/core/facets/object/replace.rb', line 27

def replace(source)
  raise ArgumentError, "not a #{self.class} -- #{source}" unless source.is_a?(self.class)
  instance_variables.each do |iv|
    instance_variable_set(iv, source.instance_variable_get(iv))
  end
end