How to use present? in Ruby projects?

I wrote a script that uses Rails' extensions to the Ruby core Object class, and now I want to spin it off on its own. 开发者_如何学CRather than rewriting these, is there any library or extension that I can use to make them available independently?

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You don't have to run Rails to use

require 'active_support/all'

or if you just want a specific extension, like blank? for string then just

require 'active_support/core_ext/string'

I looked up present? and it's actually defined as

def present?
  !blank?
end

blank defined in active support as

def blank?
  respond_to?(:empty?) ? !!empty? : !self
end

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You can require specific functionality from ActiveSupport. In this case:

require 'active_support/core_ext/object/blank'
[].present? #=> false