def constantize(camel_cased_word)
      camel_cased_word = camel_cased_word.to_s

      if camel_cased_word.include?('-')
        camel_cased_word = classify(camel_cased_word)
      end

      names = camel_cased_word.split('::')
      names.shift if names.empty? || names.first.empty?

      constant = Object
      names.each do |name|
        args = Module.method(:const_get).arity != 1 ? [false] : []

        if constant.const_defined?(name, *args)
          constant = constant.const_get(name)
        else
          constant = constant.const_missing(name)
        end
      end
      constant
    end
Tries to find a constant with the name specified in the argument string:

@example
constantize("Module") # => Module
constantize("Test::Unit") # => Test::Unit

NameError is raised when the constant is unknown.