CODEWITHSUNDEEP
rubyruby-on-rails-3
picardo
picardo

Reputation: 24886

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. Rather than rewriting these, is there any library or extension that I can use to make them available independently?

Upvotes: 16

Views: 20357

Answers (2)

Jonas Elfström
Jonas Elfström

Reputation: 31438

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

Upvotes: 30

tokland
tokland

Reputation: 67900

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

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

Upvotes: 9

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