respond_to?(name, include_private = false)
Instance Public methods
A Person object with a
name attribute can ask person.respond_to?(:name),
person.respond_to?(:name=), and
person.respond_to?(:name?) which will all return
true. It also define the attribute methods if they have not
been generated.
class Person < ActiveRecord::Base
end
person = Person.new
person.respond_to(:name) # => true
person.respond_to(:name=) # => true
person.respond_to(:name?) # => true
person.respond_to('age') # => true
person.respond_to('age=') # => true
person.respond_to('age?') # => true
person.respond_to(:nothing) # => false
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