Accessing a class's constants
What you posted should work perfectly:
class Foo CONSTANT_NAME = ["a", "b", "c"]endFoo::CONSTANT_NAME# => ["a", "b", "c"]
If you're writing additional code within your class that contains the constant, you can treat it like a global.
class Foo MY_CONSTANT = "hello" def bar MY_CONSTANT endendFoo.new.bar #=> helloIf you're accessing the constant outside of the class, prefix it with the class name, followed by two colons
Foo::MY_CONSTANT #=> hello
Some alternatives:
class Foo MY_CONSTANT = "hello"endFoo::MY_CONSTANT# => "hello"Foo.const_get :MY_CONSTANT# => "hello"x = Foo.newx.class::MY_CONSTANT# => "hello"x.class.const_defined? :MY_CONSTANT# => truex.class.const_get :MY_CONSTANT# => "hello"