Accessing a class's constants

Question

When I have the following:

class Foo
   CONSTANT_NAME = [\"a\", \"b\", \"c\"]

  ...
end

Is there a way to access with Foo::CONSTANT_

Answer 1

Some alternatives:

class Foo
  MY_CONSTANT = "hello"
end

Foo::MY_CONSTANT
# => "hello"

Foo.const_get :MY_CONSTANT
# => "hello"

x = Foo.new
x.class::MY_CONSTANT
# => "hello"

x.class.const_defined? :MY_CONSTANT
# => true

x.class.const_get :MY_CONSTANT
# => "hello"