Contents

module Tins
  # Implementation of the null object pattern in Ruby.
  module Null
    def method_missing(*)
      self
    end

    def const_missing(*)
      self
    end

    def to_s
      ''
    end

    def to_f
      0.0
    end

    def to_i
      0
    end

    def to_a
      []
    end

    def inspect
      'NULL'
    end

    def nil?
      true
    end

    module Kernel
      def Null(value = nil)
        value.nil? ? Tins::NULL : value
      end
    end
  end

  NULL = Class.new(Module) do
    include Tins::Null
  end.new.freeze
end

require 'tins/alias'

Version data entries

13 entries across 13 versions & 1 rubygems

Version	Path
tins-0.5.0	lib/tins/null.rb
tins-0.4.3	lib/tins/null.rb
tins-0.4.2	lib/tins/null.rb
tins-0.4.1	lib/tins/null.rb
tins-0.4.0	lib/tins/null.rb
tins-0.3.14	lib/tins/null.rb
tins-0.3.13	lib/tins/null.rb
tins-0.3.12	lib/tins/null.rb
tins-0.3.11	lib/tins/null.rb
tins-0.3.10	lib/tins/null.rb
tins-0.3.9	lib/tins/null.rb
tins-0.3.8	lib/tins/null.rb
tins-0.3.7	lib/tins/null.rb