--- Module.constants

    Υ᥽åɤƤӽФǻȲǽ֤̾ޤ

        class Foo
          FOO = 1
        end

        p Module.constants

        #  FOO ϸʤ
        => ["RUBY_PLATFORM", "STDIN", ..., "Foo", ... ]

    Module#constants [Module/constants] 䡢
    local_variables,
    global_variables,
    Object#instance_variables [Object/instance_variables],
    Module#class_variables [Module/class_variables]
    ⻲ȤƤ

