Question

I have a module RegexHelper which contain methoids to verify if a string is only numeric:

module RegexHelper
  def is_numeric?(str)
    !!str.match(/^[0-9]+$/)
  end
end

And I include this module in several classes and it works well when I try using them in instance methods. But now I want to use them in class methods and it simply doesnt work eaven callingRegexHelper.is_numeric?(my_str) doesnt work for me.

I think the problem might be that the include RegeHelper is exexute when creating a new object. So how can I make this work for the whole class?

Answer 1

Try this:

extend RegeHelper

include is for adding instance methods to a class and extend is for adding class methods.