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class Object
# Available in 1.8.6 and later.
unless respond_to?(:instance_variable_defined?)
def instance_variable_defined?(variable)
instance_variables.include?(variable.to_s)
end
end
def instance_values #:nodoc:
instance_variables.inject({}) do |values, name|
values[name.to_s[1..-1]] = instance_variable_get(name)
values
end
end
def copy_instance_variables_from(object, exclude = []) #:nodoc:
exclude += object.protected_instance_variables if object.respond_to? :protected_instance_variables
vars = object.instance_variables.map(&:to_s) - exclude.map(&:to_s)
vars.each { |name| instance_variable_set(name, object.instance_variable_get(name)) }
end
end
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