vendor/rails/actionmailer/lib/action_mailer/vendor/tmail-1.2.3/tmail/core_extensions.rb

   1 #:stopdoc:
   2 unless Object.respond_to?(:blank?)
   3   class Object
   4     # Check first to see if we are in a Rails environment, no need to
   5     # define these methods if we are
   6
   7     # An object is blank if it's nil, empty, or a whitespace string.
   8     # For example, "", "   ", nil, [], and {} are blank.
   9     #
  10     # This simplifies
  11     #   if !address.nil? && !address.empty?
  12     # to
  13     #   if !address.blank?
  14     def blank?
  15       if respond_to?(:empty?) && respond_to?(:strip)
  16         empty? or strip.empty?
  17       elsif respond_to?(:empty?)
  18         empty?
  19       else
  20         !self
  21       end
  22     end
  23   end
  24
  25   class NilClass
  26     def blank?
  27       true
  28     end
  29   end
  30
  31   class FalseClass
  32     def blank?
  33       true
  34     end
  35   end
  36
  37   class TrueClass
  38     def blank?
  39       false
  40     end
  41   end
  42
  43   class Array
  44     alias_method :blank?, :empty?
  45   end
  46
  47   class Hash
  48     alias_method :blank?, :empty?
  49   end
  50
  51   class String
  52     def blank?
  53       empty? || strip.empty?
  54     end
  55   end
  56
  57   class Numeric
  58     def blank?
  59       false
  60     end
  61   end
  62 end
  63 #:startdoc: